Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * NET An implementation of the SOCKET network access protocol. | |
3 | * | |
4 | * Version: @(#)socket.c 1.1.93 18/02/95 | |
5 | * | |
6 | * Authors: Orest Zborowski, <obz@Kodak.COM> | |
02c30a84 | 7 | * Ross Biro |
1da177e4 LT |
8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
9 | * | |
10 | * Fixes: | |
11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in | |
12 | * shutdown() | |
13 | * Alan Cox : verify_area() fixes | |
14 | * Alan Cox : Removed DDI | |
15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug | |
16 | * Alan Cox : Moved a load of checks to the very | |
17 | * top level. | |
18 | * Alan Cox : Move address structures to/from user | |
19 | * mode above the protocol layers. | |
20 | * Rob Janssen : Allow 0 length sends. | |
21 | * Alan Cox : Asynchronous I/O support (cribbed from the | |
22 | * tty drivers). | |
23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) | |
24 | * Jeff Uphoff : Made max number of sockets command-line | |
25 | * configurable. | |
26 | * Matti Aarnio : Made the number of sockets dynamic, | |
27 | * to be allocated when needed, and mr. | |
28 | * Uphoff's max is used as max to be | |
29 | * allowed to allocate. | |
30 | * Linus : Argh. removed all the socket allocation | |
31 | * altogether: it's in the inode now. | |
32 | * Alan Cox : Made sock_alloc()/sock_release() public | |
33 | * for NetROM and future kernel nfsd type | |
34 | * stuff. | |
35 | * Alan Cox : sendmsg/recvmsg basics. | |
36 | * Tom Dyas : Export net symbols. | |
37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". | |
38 | * Alan Cox : Added thread locking to sys_* calls | |
39 | * for sockets. May have errors at the | |
40 | * moment. | |
41 | * Kevin Buhr : Fixed the dumb errors in the above. | |
42 | * Andi Kleen : Some small cleanups, optimizations, | |
43 | * and fixed a copy_from_user() bug. | |
44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) | |
89bddce5 | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
1da177e4 LT |
46 | * protocol-independent |
47 | * | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or | |
50 | * modify it under the terms of the GNU General Public License | |
51 | * as published by the Free Software Foundation; either version | |
52 | * 2 of the License, or (at your option) any later version. | |
53 | * | |
54 | * | |
55 | * This module is effectively the top level interface to the BSD socket | |
89bddce5 | 56 | * paradigm. |
1da177e4 LT |
57 | * |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
1da177e4 | 61 | #include <linux/mm.h> |
1da177e4 LT |
62 | #include <linux/socket.h> |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
aaca0bdc | 66 | #include <linux/thread_info.h> |
55737fda | 67 | #include <linux/rcupdate.h> |
1da177e4 LT |
68 | #include <linux/netdevice.h> |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
4a3e2f71 | 71 | #include <linux/mutex.h> |
1da177e4 | 72 | #include <linux/if_bridge.h> |
20380731 ACM |
73 | #include <linux/if_frad.h> |
74 | #include <linux/if_vlan.h> | |
1da177e4 LT |
75 | #include <linux/init.h> |
76 | #include <linux/poll.h> | |
77 | #include <linux/cache.h> | |
78 | #include <linux/module.h> | |
79 | #include <linux/highmem.h> | |
1da177e4 LT |
80 | #include <linux/mount.h> |
81 | #include <linux/security.h> | |
82 | #include <linux/syscalls.h> | |
83 | #include <linux/compat.h> | |
84 | #include <linux/kmod.h> | |
3ec3b2fb | 85 | #include <linux/audit.h> |
d86b5e0e | 86 | #include <linux/wireless.h> |
1b8d7ae4 | 87 | #include <linux/nsproxy.h> |
1fd7317d | 88 | #include <linux/magic.h> |
5a0e3ad6 | 89 | #include <linux/slab.h> |
600e1779 | 90 | #include <linux/xattr.h> |
1da177e4 LT |
91 | |
92 | #include <asm/uaccess.h> | |
93 | #include <asm/unistd.h> | |
94 | ||
95 | #include <net/compat.h> | |
87de87d5 | 96 | #include <net/wext.h> |
f8451725 | 97 | #include <net/cls_cgroup.h> |
1da177e4 LT |
98 | |
99 | #include <net/sock.h> | |
100 | #include <linux/netfilter.h> | |
101 | ||
6b96018b AB |
102 | #include <linux/if_tun.h> |
103 | #include <linux/ipv6_route.h> | |
104 | #include <linux/route.h> | |
6b96018b AB |
105 | #include <linux/sockios.h> |
106 | #include <linux/atalk.h> | |
076bb0c8 | 107 | #include <net/busy_poll.h> |
06021292 | 108 | |
e0d1095a | 109 | #ifdef CONFIG_NET_RX_BUSY_POLL |
64b0dc51 ET |
110 | unsigned int sysctl_net_busy_read __read_mostly; |
111 | unsigned int sysctl_net_busy_poll __read_mostly; | |
06021292 | 112 | #endif |
6b96018b | 113 | |
1da177e4 | 114 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
027445c3 BP |
115 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
116 | unsigned long nr_segs, loff_t pos); | |
117 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
118 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 119 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
120 | |
121 | static int sock_close(struct inode *inode, struct file *file); | |
122 | static unsigned int sock_poll(struct file *file, | |
123 | struct poll_table_struct *wait); | |
89bddce5 | 124 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
125 | #ifdef CONFIG_COMPAT |
126 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 127 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 128 | #endif |
1da177e4 | 129 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
130 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
131 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 132 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 133 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 134 | unsigned int flags); |
1da177e4 | 135 | |
1da177e4 LT |
136 | /* |
137 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
138 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
139 | */ | |
140 | ||
da7071d7 | 141 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
142 | .owner = THIS_MODULE, |
143 | .llseek = no_llseek, | |
144 | .aio_read = sock_aio_read, | |
145 | .aio_write = sock_aio_write, | |
146 | .poll = sock_poll, | |
147 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
148 | #ifdef CONFIG_COMPAT |
149 | .compat_ioctl = compat_sock_ioctl, | |
150 | #endif | |
1da177e4 LT |
151 | .mmap = sock_mmap, |
152 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
153 | .release = sock_close, | |
154 | .fasync = sock_fasync, | |
5274f052 JA |
155 | .sendpage = sock_sendpage, |
156 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 157 | .splice_read = sock_splice_read, |
1da177e4 LT |
158 | }; |
159 | ||
160 | /* | |
161 | * The protocol list. Each protocol is registered in here. | |
162 | */ | |
163 | ||
1da177e4 | 164 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 165 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 166 | |
1da177e4 LT |
167 | /* |
168 | * Statistics counters of the socket lists | |
169 | */ | |
170 | ||
c6d409cf | 171 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
172 | |
173 | /* | |
89bddce5 SH |
174 | * Support routines. |
175 | * Move socket addresses back and forth across the kernel/user | |
176 | * divide and look after the messy bits. | |
1da177e4 LT |
177 | */ |
178 | ||
1da177e4 LT |
179 | /** |
180 | * move_addr_to_kernel - copy a socket address into kernel space | |
181 | * @uaddr: Address in user space | |
182 | * @kaddr: Address in kernel space | |
183 | * @ulen: Length in user space | |
184 | * | |
185 | * The address is copied into kernel space. If the provided address is | |
186 | * too long an error code of -EINVAL is returned. If the copy gives | |
187 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
188 | */ | |
189 | ||
43db362d | 190 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 191 | { |
230b1839 | 192 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 193 | return -EINVAL; |
89bddce5 | 194 | if (ulen == 0) |
1da177e4 | 195 | return 0; |
89bddce5 | 196 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 197 | return -EFAULT; |
3ec3b2fb | 198 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
199 | } |
200 | ||
201 | /** | |
202 | * move_addr_to_user - copy an address to user space | |
203 | * @kaddr: kernel space address | |
204 | * @klen: length of address in kernel | |
205 | * @uaddr: user space address | |
206 | * @ulen: pointer to user length field | |
207 | * | |
208 | * The value pointed to by ulen on entry is the buffer length available. | |
209 | * This is overwritten with the buffer space used. -EINVAL is returned | |
210 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
211 | * is returned if either the buffer or the length field are not | |
212 | * accessible. | |
213 | * After copying the data up to the limit the user specifies, the true | |
214 | * length of the data is written over the length limit the user | |
215 | * specified. Zero is returned for a success. | |
216 | */ | |
89bddce5 | 217 | |
43db362d | 218 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 219 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
220 | { |
221 | int err; | |
222 | int len; | |
223 | ||
68c6beb3 | 224 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
89bddce5 SH |
225 | err = get_user(len, ulen); |
226 | if (err) | |
1da177e4 | 227 | return err; |
89bddce5 SH |
228 | if (len > klen) |
229 | len = klen; | |
68c6beb3 | 230 | if (len < 0) |
1da177e4 | 231 | return -EINVAL; |
89bddce5 | 232 | if (len) { |
d6fe3945 SG |
233 | if (audit_sockaddr(klen, kaddr)) |
234 | return -ENOMEM; | |
89bddce5 | 235 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
236 | return -EFAULT; |
237 | } | |
238 | /* | |
89bddce5 SH |
239 | * "fromlen shall refer to the value before truncation.." |
240 | * 1003.1g | |
1da177e4 LT |
241 | */ |
242 | return __put_user(klen, ulen); | |
243 | } | |
244 | ||
e18b890b | 245 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
246 | |
247 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
248 | { | |
249 | struct socket_alloc *ei; | |
eaefd110 | 250 | struct socket_wq *wq; |
89bddce5 | 251 | |
e94b1766 | 252 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
253 | if (!ei) |
254 | return NULL; | |
eaefd110 ED |
255 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
256 | if (!wq) { | |
43815482 ED |
257 | kmem_cache_free(sock_inode_cachep, ei); |
258 | return NULL; | |
259 | } | |
eaefd110 ED |
260 | init_waitqueue_head(&wq->wait); |
261 | wq->fasync_list = NULL; | |
262 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 263 | |
1da177e4 LT |
264 | ei->socket.state = SS_UNCONNECTED; |
265 | ei->socket.flags = 0; | |
266 | ei->socket.ops = NULL; | |
267 | ei->socket.sk = NULL; | |
268 | ei->socket.file = NULL; | |
1da177e4 LT |
269 | |
270 | return &ei->vfs_inode; | |
271 | } | |
272 | ||
273 | static void sock_destroy_inode(struct inode *inode) | |
274 | { | |
43815482 | 275 | struct socket_alloc *ei; |
eaefd110 | 276 | struct socket_wq *wq; |
43815482 ED |
277 | |
278 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 279 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 280 | kfree_rcu(wq, rcu); |
43815482 | 281 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
282 | } |
283 | ||
51cc5068 | 284 | static void init_once(void *foo) |
1da177e4 | 285 | { |
89bddce5 | 286 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 287 | |
a35afb83 | 288 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 289 | } |
89bddce5 | 290 | |
1da177e4 LT |
291 | static int init_inodecache(void) |
292 | { | |
293 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
294 | sizeof(struct socket_alloc), |
295 | 0, | |
296 | (SLAB_HWCACHE_ALIGN | | |
297 | SLAB_RECLAIM_ACCOUNT | | |
298 | SLAB_MEM_SPREAD), | |
20c2df83 | 299 | init_once); |
1da177e4 LT |
300 | if (sock_inode_cachep == NULL) |
301 | return -ENOMEM; | |
302 | return 0; | |
303 | } | |
304 | ||
b87221de | 305 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
306 | .alloc_inode = sock_alloc_inode, |
307 | .destroy_inode = sock_destroy_inode, | |
308 | .statfs = simple_statfs, | |
1da177e4 LT |
309 | }; |
310 | ||
c23fbb6b ED |
311 | /* |
312 | * sockfs_dname() is called from d_path(). | |
313 | */ | |
314 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
315 | { | |
316 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
317 | dentry->d_inode->i_ino); | |
318 | } | |
319 | ||
3ba13d17 | 320 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 321 | .d_dname = sockfs_dname, |
1da177e4 LT |
322 | }; |
323 | ||
c74a1cbb AV |
324 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
325 | int flags, const char *dev_name, void *data) | |
326 | { | |
327 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
328 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
329 | } | |
330 | ||
331 | static struct vfsmount *sock_mnt __read_mostly; | |
332 | ||
333 | static struct file_system_type sock_fs_type = { | |
334 | .name = "sockfs", | |
335 | .mount = sockfs_mount, | |
336 | .kill_sb = kill_anon_super, | |
337 | }; | |
338 | ||
1da177e4 LT |
339 | /* |
340 | * Obtains the first available file descriptor and sets it up for use. | |
341 | * | |
39d8c1b6 DM |
342 | * These functions create file structures and maps them to fd space |
343 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
344 | * and file struct implicitly stored in sock->file. |
345 | * Note that another thread may close file descriptor before we return | |
346 | * from this function. We use the fact that now we do not refer | |
347 | * to socket after mapping. If one day we will need it, this | |
348 | * function will increment ref. count on file by 1. | |
349 | * | |
350 | * In any case returned fd MAY BE not valid! | |
351 | * This race condition is unavoidable | |
352 | * with shared fd spaces, we cannot solve it inside kernel, | |
353 | * but we take care of internal coherence yet. | |
354 | */ | |
355 | ||
aab174f0 | 356 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
1da177e4 | 357 | { |
7cbe66b6 | 358 | struct qstr name = { .name = "" }; |
2c48b9c4 | 359 | struct path path; |
7cbe66b6 | 360 | struct file *file; |
1da177e4 | 361 | |
600e1779 MY |
362 | if (dname) { |
363 | name.name = dname; | |
364 | name.len = strlen(name.name); | |
365 | } else if (sock->sk) { | |
366 | name.name = sock->sk->sk_prot_creator->name; | |
367 | name.len = strlen(name.name); | |
368 | } | |
4b936885 | 369 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
28407630 AV |
370 | if (unlikely(!path.dentry)) |
371 | return ERR_PTR(-ENOMEM); | |
2c48b9c4 | 372 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 373 | |
2c48b9c4 | 374 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 375 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 376 | |
2c48b9c4 | 377 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 378 | &socket_file_ops); |
39b65252 | 379 | if (unlikely(IS_ERR(file))) { |
cc3808f8 | 380 | /* drop dentry, keep inode */ |
7de9c6ee | 381 | ihold(path.dentry->d_inode); |
2c48b9c4 | 382 | path_put(&path); |
39b65252 | 383 | return file; |
cc3808f8 AV |
384 | } |
385 | ||
386 | sock->file = file; | |
77d27200 | 387 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 | 388 | file->private_data = sock; |
28407630 | 389 | return file; |
39d8c1b6 | 390 | } |
56b31d1c | 391 | EXPORT_SYMBOL(sock_alloc_file); |
39d8c1b6 | 392 | |
56b31d1c | 393 | static int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
394 | { |
395 | struct file *newfile; | |
28407630 AV |
396 | int fd = get_unused_fd_flags(flags); |
397 | if (unlikely(fd < 0)) | |
398 | return fd; | |
39d8c1b6 | 399 | |
aab174f0 | 400 | newfile = sock_alloc_file(sock, flags, NULL); |
28407630 | 401 | if (likely(!IS_ERR(newfile))) { |
39d8c1b6 | 402 | fd_install(fd, newfile); |
28407630 AV |
403 | return fd; |
404 | } | |
7cbe66b6 | 405 | |
28407630 AV |
406 | put_unused_fd(fd); |
407 | return PTR_ERR(newfile); | |
1da177e4 LT |
408 | } |
409 | ||
406a3c63 | 410 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 411 | { |
6cb153ca BL |
412 | if (file->f_op == &socket_file_ops) |
413 | return file->private_data; /* set in sock_map_fd */ | |
414 | ||
23bb80d2 ED |
415 | *err = -ENOTSOCK; |
416 | return NULL; | |
6cb153ca | 417 | } |
406a3c63 | 418 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 419 | |
1da177e4 | 420 | /** |
c6d409cf | 421 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
422 | * @fd: file handle |
423 | * @err: pointer to an error code return | |
424 | * | |
425 | * The file handle passed in is locked and the socket it is bound | |
426 | * too is returned. If an error occurs the err pointer is overwritten | |
427 | * with a negative errno code and NULL is returned. The function checks | |
428 | * for both invalid handles and passing a handle which is not a socket. | |
429 | * | |
430 | * On a success the socket object pointer is returned. | |
431 | */ | |
432 | ||
433 | struct socket *sockfd_lookup(int fd, int *err) | |
434 | { | |
435 | struct file *file; | |
1da177e4 LT |
436 | struct socket *sock; |
437 | ||
89bddce5 SH |
438 | file = fget(fd); |
439 | if (!file) { | |
1da177e4 LT |
440 | *err = -EBADF; |
441 | return NULL; | |
442 | } | |
89bddce5 | 443 | |
6cb153ca BL |
444 | sock = sock_from_file(file, err); |
445 | if (!sock) | |
1da177e4 | 446 | fput(file); |
6cb153ca BL |
447 | return sock; |
448 | } | |
c6d409cf | 449 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 450 | |
6cb153ca BL |
451 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
452 | { | |
453 | struct file *file; | |
454 | struct socket *sock; | |
455 | ||
3672558c | 456 | *err = -EBADF; |
6cb153ca BL |
457 | file = fget_light(fd, fput_needed); |
458 | if (file) { | |
459 | sock = sock_from_file(file, err); | |
460 | if (sock) | |
461 | return sock; | |
462 | fput_light(file, *fput_needed); | |
1da177e4 | 463 | } |
6cb153ca | 464 | return NULL; |
1da177e4 LT |
465 | } |
466 | ||
600e1779 MY |
467 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
468 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) | |
469 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) | |
470 | static ssize_t sockfs_getxattr(struct dentry *dentry, | |
471 | const char *name, void *value, size_t size) | |
472 | { | |
473 | const char *proto_name; | |
474 | size_t proto_size; | |
475 | int error; | |
476 | ||
477 | error = -ENODATA; | |
478 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { | |
479 | proto_name = dentry->d_name.name; | |
480 | proto_size = strlen(proto_name); | |
481 | ||
482 | if (value) { | |
483 | error = -ERANGE; | |
484 | if (proto_size + 1 > size) | |
485 | goto out; | |
486 | ||
487 | strncpy(value, proto_name, proto_size + 1); | |
488 | } | |
489 | error = proto_size + 1; | |
490 | } | |
491 | ||
492 | out: | |
493 | return error; | |
494 | } | |
495 | ||
496 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, | |
497 | size_t size) | |
498 | { | |
499 | ssize_t len; | |
500 | ssize_t used = 0; | |
501 | ||
502 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); | |
503 | if (len < 0) | |
504 | return len; | |
505 | used += len; | |
506 | if (buffer) { | |
507 | if (size < used) | |
508 | return -ERANGE; | |
509 | buffer += len; | |
510 | } | |
511 | ||
512 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
513 | used += len; | |
514 | if (buffer) { | |
515 | if (size < used) | |
516 | return -ERANGE; | |
517 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
518 | buffer += len; | |
519 | } | |
520 | ||
521 | return used; | |
522 | } | |
523 | ||
524 | static const struct inode_operations sockfs_inode_ops = { | |
525 | .getxattr = sockfs_getxattr, | |
526 | .listxattr = sockfs_listxattr, | |
527 | }; | |
528 | ||
1da177e4 LT |
529 | /** |
530 | * sock_alloc - allocate a socket | |
89bddce5 | 531 | * |
1da177e4 LT |
532 | * Allocate a new inode and socket object. The two are bound together |
533 | * and initialised. The socket is then returned. If we are out of inodes | |
534 | * NULL is returned. | |
535 | */ | |
536 | ||
537 | static struct socket *sock_alloc(void) | |
538 | { | |
89bddce5 SH |
539 | struct inode *inode; |
540 | struct socket *sock; | |
1da177e4 | 541 | |
a209dfc7 | 542 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
543 | if (!inode) |
544 | return NULL; | |
545 | ||
546 | sock = SOCKET_I(inode); | |
547 | ||
29a020d3 | 548 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 549 | inode->i_ino = get_next_ino(); |
89bddce5 | 550 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
551 | inode->i_uid = current_fsuid(); |
552 | inode->i_gid = current_fsgid(); | |
600e1779 | 553 | inode->i_op = &sockfs_inode_ops; |
1da177e4 | 554 | |
19e8d69c | 555 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
556 | return sock; |
557 | } | |
558 | ||
559 | /* | |
560 | * In theory you can't get an open on this inode, but /proc provides | |
561 | * a back door. Remember to keep it shut otherwise you'll let the | |
562 | * creepy crawlies in. | |
563 | */ | |
89bddce5 | 564 | |
1da177e4 LT |
565 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
566 | { | |
567 | return -ENXIO; | |
568 | } | |
569 | ||
4b6f5d20 | 570 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
571 | .owner = THIS_MODULE, |
572 | .open = sock_no_open, | |
6038f373 | 573 | .llseek = noop_llseek, |
1da177e4 LT |
574 | }; |
575 | ||
576 | /** | |
577 | * sock_release - close a socket | |
578 | * @sock: socket to close | |
579 | * | |
580 | * The socket is released from the protocol stack if it has a release | |
581 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 582 | * an inode not a file. |
1da177e4 | 583 | */ |
89bddce5 | 584 | |
1da177e4 LT |
585 | void sock_release(struct socket *sock) |
586 | { | |
587 | if (sock->ops) { | |
588 | struct module *owner = sock->ops->owner; | |
589 | ||
590 | sock->ops->release(sock); | |
591 | sock->ops = NULL; | |
592 | module_put(owner); | |
593 | } | |
594 | ||
eaefd110 | 595 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
1da177e4 LT |
596 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
597 | ||
b09e786b MP |
598 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
599 | return; | |
600 | ||
19e8d69c | 601 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
602 | if (!sock->file) { |
603 | iput(SOCK_INODE(sock)); | |
604 | return; | |
605 | } | |
89bddce5 | 606 | sock->file = NULL; |
1da177e4 | 607 | } |
c6d409cf | 608 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 609 | |
bf84a010 | 610 | void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
20d49473 | 611 | { |
2244d07b | 612 | *tx_flags = 0; |
20d49473 | 613 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
2244d07b | 614 | *tx_flags |= SKBTX_HW_TSTAMP; |
20d49473 | 615 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
2244d07b | 616 | *tx_flags |= SKBTX_SW_TSTAMP; |
6e3e939f JB |
617 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
618 | *tx_flags |= SKBTX_WIFI_STATUS; | |
20d49473 PO |
619 | } |
620 | EXPORT_SYMBOL(sock_tx_timestamp); | |
621 | ||
228e548e AB |
622 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
623 | struct msghdr *msg, size_t size) | |
1da177e4 LT |
624 | { |
625 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
1da177e4 LT |
626 | |
627 | si->sock = sock; | |
628 | si->scm = NULL; | |
629 | si->msg = msg; | |
630 | si->size = size; | |
631 | ||
1da177e4 LT |
632 | return sock->ops->sendmsg(iocb, sock, msg, size); |
633 | } | |
634 | ||
228e548e AB |
635 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
636 | struct msghdr *msg, size_t size) | |
637 | { | |
638 | int err = security_socket_sendmsg(sock, msg, size); | |
639 | ||
640 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
641 | } | |
642 | ||
1da177e4 LT |
643 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
644 | { | |
645 | struct kiocb iocb; | |
646 | struct sock_iocb siocb; | |
647 | int ret; | |
648 | ||
649 | init_sync_kiocb(&iocb, NULL); | |
650 | iocb.private = &siocb; | |
651 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
652 | if (-EIOCBQUEUED == ret) | |
653 | ret = wait_on_sync_kiocb(&iocb); | |
654 | return ret; | |
655 | } | |
c6d409cf | 656 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 | 657 | |
894dc24c | 658 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e AB |
659 | { |
660 | struct kiocb iocb; | |
661 | struct sock_iocb siocb; | |
662 | int ret; | |
663 | ||
664 | init_sync_kiocb(&iocb, NULL); | |
665 | iocb.private = &siocb; | |
666 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); | |
667 | if (-EIOCBQUEUED == ret) | |
668 | ret = wait_on_sync_kiocb(&iocb); | |
669 | return ret; | |
670 | } | |
671 | ||
1da177e4 LT |
672 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
673 | struct kvec *vec, size_t num, size_t size) | |
674 | { | |
675 | mm_segment_t oldfs = get_fs(); | |
676 | int result; | |
677 | ||
678 | set_fs(KERNEL_DS); | |
679 | /* | |
680 | * the following is safe, since for compiler definitions of kvec and | |
681 | * iovec are identical, yielding the same in-core layout and alignment | |
682 | */ | |
89bddce5 | 683 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
684 | msg->msg_iovlen = num; |
685 | result = sock_sendmsg(sock, msg, size); | |
686 | set_fs(oldfs); | |
687 | return result; | |
688 | } | |
c6d409cf | 689 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 690 | |
92f37fd2 ED |
691 | /* |
692 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
693 | */ | |
694 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
695 | struct sk_buff *skb) | |
696 | { | |
20d49473 PO |
697 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
698 | struct timespec ts[3]; | |
699 | int empty = 1; | |
700 | struct skb_shared_hwtstamps *shhwtstamps = | |
701 | skb_hwtstamps(skb); | |
702 | ||
703 | /* Race occurred between timestamp enabling and packet | |
704 | receiving. Fill in the current time for now. */ | |
705 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
706 | __net_timestamp(skb); | |
707 | ||
708 | if (need_software_tstamp) { | |
709 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
710 | struct timeval tv; | |
711 | skb_get_timestamp(skb, &tv); | |
712 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
713 | sizeof(tv), &tv); | |
714 | } else { | |
842509b8 | 715 | skb_get_timestampns(skb, &ts[0]); |
20d49473 | 716 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
842509b8 | 717 | sizeof(ts[0]), &ts[0]); |
20d49473 PO |
718 | } |
719 | } | |
720 | ||
721 | ||
722 | memset(ts, 0, sizeof(ts)); | |
6e94d1ef DB |
723 | if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) && |
724 | ktime_to_timespec_cond(skb->tstamp, ts + 0)) | |
20d49473 | 725 | empty = 0; |
20d49473 PO |
726 | if (shhwtstamps) { |
727 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
6e94d1ef | 728 | ktime_to_timespec_cond(shhwtstamps->syststamp, ts + 1)) |
20d49473 PO |
729 | empty = 0; |
730 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
6e94d1ef | 731 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts + 2)) |
20d49473 | 732 | empty = 0; |
92f37fd2 | 733 | } |
20d49473 PO |
734 | if (!empty) |
735 | put_cmsg(msg, SOL_SOCKET, | |
736 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 | 737 | } |
7c81fd8b ACM |
738 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
739 | ||
6e3e939f JB |
740 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
741 | struct sk_buff *skb) | |
742 | { | |
743 | int ack; | |
744 | ||
745 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
746 | return; | |
747 | if (!skb->wifi_acked_valid) | |
748 | return; | |
749 | ||
750 | ack = skb->wifi_acked; | |
751 | ||
752 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
753 | } | |
754 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
755 | ||
11165f14 | 756 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
757 | struct sk_buff *skb) | |
3b885787 NH |
758 | { |
759 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
760 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
761 | sizeof(__u32), &skb->dropcount); | |
762 | } | |
763 | ||
767dd033 | 764 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
765 | struct sk_buff *skb) |
766 | { | |
767 | sock_recv_timestamp(msg, sk, skb); | |
768 | sock_recv_drops(msg, sk, skb); | |
769 | } | |
767dd033 | 770 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 771 | |
a2e27255 ACM |
772 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
773 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 774 | { |
1da177e4 LT |
775 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
776 | ||
777 | si->sock = sock; | |
778 | si->scm = NULL; | |
779 | si->msg = msg; | |
780 | si->size = size; | |
781 | si->flags = flags; | |
782 | ||
1da177e4 LT |
783 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
784 | } | |
785 | ||
a2e27255 ACM |
786 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
787 | struct msghdr *msg, size_t size, int flags) | |
788 | { | |
789 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
790 | ||
791 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
792 | } | |
793 | ||
89bddce5 | 794 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
795 | size_t size, int flags) |
796 | { | |
797 | struct kiocb iocb; | |
798 | struct sock_iocb siocb; | |
799 | int ret; | |
800 | ||
89bddce5 | 801 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
802 | iocb.private = &siocb; |
803 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
804 | if (-EIOCBQUEUED == ret) | |
805 | ret = wait_on_sync_kiocb(&iocb); | |
806 | return ret; | |
807 | } | |
c6d409cf | 808 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 809 | |
a2e27255 ACM |
810 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
811 | size_t size, int flags) | |
812 | { | |
813 | struct kiocb iocb; | |
814 | struct sock_iocb siocb; | |
815 | int ret; | |
816 | ||
817 | init_sync_kiocb(&iocb, NULL); | |
818 | iocb.private = &siocb; | |
819 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
820 | if (-EIOCBQUEUED == ret) | |
821 | ret = wait_on_sync_kiocb(&iocb); | |
822 | return ret; | |
823 | } | |
824 | ||
c1249c0a ML |
825 | /** |
826 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
827 | * @sock: The socket to receive the message from | |
828 | * @msg: Received message | |
829 | * @vec: Input s/g array for message data | |
830 | * @num: Size of input s/g array | |
831 | * @size: Number of bytes to read | |
832 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
833 | * | |
834 | * On return the msg structure contains the scatter/gather array passed in the | |
835 | * vec argument. The array is modified so that it consists of the unfilled | |
836 | * portion of the original array. | |
837 | * | |
838 | * The returned value is the total number of bytes received, or an error. | |
839 | */ | |
89bddce5 SH |
840 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
841 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
842 | { |
843 | mm_segment_t oldfs = get_fs(); | |
844 | int result; | |
845 | ||
846 | set_fs(KERNEL_DS); | |
847 | /* | |
848 | * the following is safe, since for compiler definitions of kvec and | |
849 | * iovec are identical, yielding the same in-core layout and alignment | |
850 | */ | |
89bddce5 | 851 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
852 | result = sock_recvmsg(sock, msg, size, flags); |
853 | set_fs(oldfs); | |
854 | return result; | |
855 | } | |
c6d409cf | 856 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 | 857 | |
ce1d4d3e CH |
858 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
859 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 860 | { |
1da177e4 LT |
861 | struct socket *sock; |
862 | int flags; | |
863 | ||
ce1d4d3e CH |
864 | sock = file->private_data; |
865 | ||
35f9c09f ED |
866 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
867 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
868 | flags |= more; | |
ce1d4d3e | 869 | |
e6949583 | 870 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 871 | } |
1da177e4 | 872 | |
9c55e01c | 873 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 874 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
875 | unsigned int flags) |
876 | { | |
877 | struct socket *sock = file->private_data; | |
878 | ||
997b37da RDC |
879 | if (unlikely(!sock->ops->splice_read)) |
880 | return -EINVAL; | |
881 | ||
9c55e01c JA |
882 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
883 | } | |
884 | ||
ce1d4d3e | 885 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 886 | struct sock_iocb *siocb) |
ce1d4d3e | 887 | { |
d29c445b KO |
888 | if (!is_sync_kiocb(iocb)) |
889 | BUG(); | |
1da177e4 | 890 | |
ce1d4d3e | 891 | siocb->kiocb = iocb; |
ce1d4d3e CH |
892 | iocb->private = siocb; |
893 | return siocb; | |
1da177e4 LT |
894 | } |
895 | ||
ce1d4d3e | 896 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
897 | struct file *file, const struct iovec *iov, |
898 | unsigned long nr_segs) | |
ce1d4d3e CH |
899 | { |
900 | struct socket *sock = file->private_data; | |
901 | size_t size = 0; | |
902 | int i; | |
1da177e4 | 903 | |
89bddce5 SH |
904 | for (i = 0; i < nr_segs; i++) |
905 | size += iov[i].iov_len; | |
1da177e4 | 906 | |
ce1d4d3e CH |
907 | msg->msg_name = NULL; |
908 | msg->msg_namelen = 0; | |
909 | msg->msg_control = NULL; | |
910 | msg->msg_controllen = 0; | |
89bddce5 | 911 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
912 | msg->msg_iovlen = nr_segs; |
913 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
914 | ||
915 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
916 | } | |
917 | ||
027445c3 BP |
918 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
919 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
920 | { |
921 | struct sock_iocb siocb, *x; | |
922 | ||
1da177e4 LT |
923 | if (pos != 0) |
924 | return -ESPIPE; | |
027445c3 | 925 | |
73a7075e | 926 | if (iocb->ki_nbytes == 0) /* Match SYS5 behaviour */ |
1da177e4 LT |
927 | return 0; |
928 | ||
027445c3 BP |
929 | |
930 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
931 | if (!x) |
932 | return -ENOMEM; | |
027445c3 | 933 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
934 | } |
935 | ||
ce1d4d3e | 936 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
937 | struct file *file, const struct iovec *iov, |
938 | unsigned long nr_segs) | |
1da177e4 | 939 | { |
ce1d4d3e CH |
940 | struct socket *sock = file->private_data; |
941 | size_t size = 0; | |
942 | int i; | |
1da177e4 | 943 | |
89bddce5 SH |
944 | for (i = 0; i < nr_segs; i++) |
945 | size += iov[i].iov_len; | |
1da177e4 | 946 | |
ce1d4d3e CH |
947 | msg->msg_name = NULL; |
948 | msg->msg_namelen = 0; | |
949 | msg->msg_control = NULL; | |
950 | msg->msg_controllen = 0; | |
89bddce5 | 951 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
952 | msg->msg_iovlen = nr_segs; |
953 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
954 | if (sock->type == SOCK_SEQPACKET) | |
955 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 956 | |
ce1d4d3e | 957 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
958 | } |
959 | ||
027445c3 BP |
960 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
961 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
962 | { |
963 | struct sock_iocb siocb, *x; | |
1da177e4 | 964 | |
ce1d4d3e CH |
965 | if (pos != 0) |
966 | return -ESPIPE; | |
027445c3 | 967 | |
027445c3 | 968 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
969 | if (!x) |
970 | return -ENOMEM; | |
1da177e4 | 971 | |
027445c3 | 972 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
973 | } |
974 | ||
1da177e4 LT |
975 | /* |
976 | * Atomic setting of ioctl hooks to avoid race | |
977 | * with module unload. | |
978 | */ | |
979 | ||
4a3e2f71 | 980 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 981 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 982 | |
881d966b | 983 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 984 | { |
4a3e2f71 | 985 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 986 | br_ioctl_hook = hook; |
4a3e2f71 | 987 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
988 | } |
989 | EXPORT_SYMBOL(brioctl_set); | |
990 | ||
4a3e2f71 | 991 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 992 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 993 | |
881d966b | 994 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 995 | { |
4a3e2f71 | 996 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 997 | vlan_ioctl_hook = hook; |
4a3e2f71 | 998 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
999 | } |
1000 | EXPORT_SYMBOL(vlan_ioctl_set); | |
1001 | ||
4a3e2f71 | 1002 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 1003 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 1004 | |
89bddce5 | 1005 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 1006 | { |
4a3e2f71 | 1007 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 1008 | dlci_ioctl_hook = hook; |
4a3e2f71 | 1009 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1010 | } |
1011 | EXPORT_SYMBOL(dlci_ioctl_set); | |
1012 | ||
6b96018b AB |
1013 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
1014 | unsigned int cmd, unsigned long arg) | |
1015 | { | |
1016 | int err; | |
1017 | void __user *argp = (void __user *)arg; | |
1018 | ||
1019 | err = sock->ops->ioctl(sock, cmd, arg); | |
1020 | ||
1021 | /* | |
1022 | * If this ioctl is unknown try to hand it down | |
1023 | * to the NIC driver. | |
1024 | */ | |
1025 | if (err == -ENOIOCTLCMD) | |
1026 | err = dev_ioctl(net, cmd, argp); | |
1027 | ||
1028 | return err; | |
1029 | } | |
1030 | ||
1da177e4 LT |
1031 | /* |
1032 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
1033 | * what to do with it - that's up to the protocol still. | |
1034 | */ | |
1035 | ||
1036 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
1037 | { | |
1038 | struct socket *sock; | |
881d966b | 1039 | struct sock *sk; |
1da177e4 LT |
1040 | void __user *argp = (void __user *)arg; |
1041 | int pid, err; | |
881d966b | 1042 | struct net *net; |
1da177e4 | 1043 | |
b69aee04 | 1044 | sock = file->private_data; |
881d966b | 1045 | sk = sock->sk; |
3b1e0a65 | 1046 | net = sock_net(sk); |
1da177e4 | 1047 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 1048 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1049 | } else |
3d23e349 | 1050 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1051 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 1052 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1053 | } else |
3d23e349 | 1054 | #endif |
89bddce5 | 1055 | switch (cmd) { |
1da177e4 LT |
1056 | case FIOSETOWN: |
1057 | case SIOCSPGRP: | |
1058 | err = -EFAULT; | |
1059 | if (get_user(pid, (int __user *)argp)) | |
1060 | break; | |
1061 | err = f_setown(sock->file, pid, 1); | |
1062 | break; | |
1063 | case FIOGETOWN: | |
1064 | case SIOCGPGRP: | |
609d7fa9 | 1065 | err = put_user(f_getown(sock->file), |
89bddce5 | 1066 | (int __user *)argp); |
1da177e4 LT |
1067 | break; |
1068 | case SIOCGIFBR: | |
1069 | case SIOCSIFBR: | |
1070 | case SIOCBRADDBR: | |
1071 | case SIOCBRDELBR: | |
1072 | err = -ENOPKG; | |
1073 | if (!br_ioctl_hook) | |
1074 | request_module("bridge"); | |
1075 | ||
4a3e2f71 | 1076 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1077 | if (br_ioctl_hook) |
881d966b | 1078 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1079 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1080 | break; |
1081 | case SIOCGIFVLAN: | |
1082 | case SIOCSIFVLAN: | |
1083 | err = -ENOPKG; | |
1084 | if (!vlan_ioctl_hook) | |
1085 | request_module("8021q"); | |
1086 | ||
4a3e2f71 | 1087 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1088 | if (vlan_ioctl_hook) |
881d966b | 1089 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1090 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1091 | break; |
1da177e4 LT |
1092 | case SIOCADDDLCI: |
1093 | case SIOCDELDLCI: | |
1094 | err = -ENOPKG; | |
1095 | if (!dlci_ioctl_hook) | |
1096 | request_module("dlci"); | |
1097 | ||
7512cbf6 PE |
1098 | mutex_lock(&dlci_ioctl_mutex); |
1099 | if (dlci_ioctl_hook) | |
1da177e4 | 1100 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1101 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1102 | break; |
1103 | default: | |
6b96018b | 1104 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1105 | break; |
89bddce5 | 1106 | } |
1da177e4 LT |
1107 | return err; |
1108 | } | |
1109 | ||
1110 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1111 | { | |
1112 | int err; | |
1113 | struct socket *sock = NULL; | |
89bddce5 | 1114 | |
1da177e4 LT |
1115 | err = security_socket_create(family, type, protocol, 1); |
1116 | if (err) | |
1117 | goto out; | |
1118 | ||
1119 | sock = sock_alloc(); | |
1120 | if (!sock) { | |
1121 | err = -ENOMEM; | |
1122 | goto out; | |
1123 | } | |
1124 | ||
1da177e4 | 1125 | sock->type = type; |
7420ed23 VY |
1126 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1127 | if (err) | |
1128 | goto out_release; | |
1129 | ||
1da177e4 LT |
1130 | out: |
1131 | *res = sock; | |
1132 | return err; | |
7420ed23 VY |
1133 | out_release: |
1134 | sock_release(sock); | |
1135 | sock = NULL; | |
1136 | goto out; | |
1da177e4 | 1137 | } |
c6d409cf | 1138 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1139 | |
1140 | /* No kernel lock held - perfect */ | |
89bddce5 | 1141 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 | 1142 | { |
cbf55001 | 1143 | unsigned int busy_flag = 0; |
1da177e4 LT |
1144 | struct socket *sock; |
1145 | ||
1146 | /* | |
89bddce5 | 1147 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1148 | */ |
b69aee04 | 1149 | sock = file->private_data; |
2d48d67f | 1150 | |
cbf55001 | 1151 | if (sk_can_busy_loop(sock->sk)) { |
2d48d67f | 1152 | /* this socket can poll_ll so tell the system call */ |
cbf55001 | 1153 | busy_flag = POLL_BUSY_LOOP; |
2d48d67f ET |
1154 | |
1155 | /* once, only if requested by syscall */ | |
cbf55001 ET |
1156 | if (wait && (wait->_key & POLL_BUSY_LOOP)) |
1157 | sk_busy_loop(sock->sk, 1); | |
2d48d67f ET |
1158 | } |
1159 | ||
cbf55001 | 1160 | return busy_flag | sock->ops->poll(file, sock, wait); |
1da177e4 LT |
1161 | } |
1162 | ||
89bddce5 | 1163 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1164 | { |
b69aee04 | 1165 | struct socket *sock = file->private_data; |
1da177e4 LT |
1166 | |
1167 | return sock->ops->mmap(file, sock, vma); | |
1168 | } | |
1169 | ||
20380731 | 1170 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1171 | { |
1da177e4 LT |
1172 | sock_release(SOCKET_I(inode)); |
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * Update the socket async list | |
1178 | * | |
1179 | * Fasync_list locking strategy. | |
1180 | * | |
1181 | * 1. fasync_list is modified only under process context socket lock | |
1182 | * i.e. under semaphore. | |
1183 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1184 | * or under socket lock |
1da177e4 LT |
1185 | */ |
1186 | ||
1187 | static int sock_fasync(int fd, struct file *filp, int on) | |
1188 | { | |
989a2979 ED |
1189 | struct socket *sock = filp->private_data; |
1190 | struct sock *sk = sock->sk; | |
eaefd110 | 1191 | struct socket_wq *wq; |
1da177e4 | 1192 | |
989a2979 | 1193 | if (sk == NULL) |
1da177e4 | 1194 | return -EINVAL; |
1da177e4 LT |
1195 | |
1196 | lock_sock(sk); | |
eaefd110 ED |
1197 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1198 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1199 | |
eaefd110 | 1200 | if (!wq->fasync_list) |
989a2979 ED |
1201 | sock_reset_flag(sk, SOCK_FASYNC); |
1202 | else | |
bcdce719 | 1203 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1204 | |
989a2979 | 1205 | release_sock(sk); |
1da177e4 LT |
1206 | return 0; |
1207 | } | |
1208 | ||
43815482 | 1209 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1210 | |
1211 | int sock_wake_async(struct socket *sock, int how, int band) | |
1212 | { | |
43815482 ED |
1213 | struct socket_wq *wq; |
1214 | ||
1215 | if (!sock) | |
1216 | return -1; | |
1217 | rcu_read_lock(); | |
1218 | wq = rcu_dereference(sock->wq); | |
1219 | if (!wq || !wq->fasync_list) { | |
1220 | rcu_read_unlock(); | |
1da177e4 | 1221 | return -1; |
43815482 | 1222 | } |
89bddce5 | 1223 | switch (how) { |
8d8ad9d7 | 1224 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1225 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1226 | break; | |
1227 | goto call_kill; | |
8d8ad9d7 | 1228 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1229 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1230 | break; | |
1231 | /* fall through */ | |
8d8ad9d7 | 1232 | case SOCK_WAKE_IO: |
89bddce5 | 1233 | call_kill: |
43815482 | 1234 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1235 | break; |
8d8ad9d7 | 1236 | case SOCK_WAKE_URG: |
43815482 | 1237 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1238 | } |
43815482 | 1239 | rcu_read_unlock(); |
1da177e4 LT |
1240 | return 0; |
1241 | } | |
c6d409cf | 1242 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1243 | |
721db93a | 1244 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1245 | struct socket **res, int kern) |
1da177e4 LT |
1246 | { |
1247 | int err; | |
1248 | struct socket *sock; | |
55737fda | 1249 | const struct net_proto_family *pf; |
1da177e4 LT |
1250 | |
1251 | /* | |
89bddce5 | 1252 | * Check protocol is in range |
1da177e4 LT |
1253 | */ |
1254 | if (family < 0 || family >= NPROTO) | |
1255 | return -EAFNOSUPPORT; | |
1256 | if (type < 0 || type >= SOCK_MAX) | |
1257 | return -EINVAL; | |
1258 | ||
1259 | /* Compatibility. | |
1260 | ||
1261 | This uglymoron is moved from INET layer to here to avoid | |
1262 | deadlock in module load. | |
1263 | */ | |
1264 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1265 | static int warned; |
1da177e4 LT |
1266 | if (!warned) { |
1267 | warned = 1; | |
89bddce5 SH |
1268 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1269 | current->comm); | |
1da177e4 LT |
1270 | } |
1271 | family = PF_PACKET; | |
1272 | } | |
1273 | ||
1274 | err = security_socket_create(family, type, protocol, kern); | |
1275 | if (err) | |
1276 | return err; | |
89bddce5 | 1277 | |
55737fda SH |
1278 | /* |
1279 | * Allocate the socket and allow the family to set things up. if | |
1280 | * the protocol is 0, the family is instructed to select an appropriate | |
1281 | * default. | |
1282 | */ | |
1283 | sock = sock_alloc(); | |
1284 | if (!sock) { | |
e87cc472 | 1285 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1286 | return -ENFILE; /* Not exactly a match, but its the |
1287 | closest posix thing */ | |
1288 | } | |
1289 | ||
1290 | sock->type = type; | |
1291 | ||
95a5afca | 1292 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1293 | /* Attempt to load a protocol module if the find failed. |
1294 | * | |
1295 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1296 | * requested real, full-featured networking support upon configuration. |
1297 | * Otherwise module support will break! | |
1298 | */ | |
190683a9 | 1299 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1300 | request_module("net-pf-%d", family); |
1da177e4 LT |
1301 | #endif |
1302 | ||
55737fda SH |
1303 | rcu_read_lock(); |
1304 | pf = rcu_dereference(net_families[family]); | |
1305 | err = -EAFNOSUPPORT; | |
1306 | if (!pf) | |
1307 | goto out_release; | |
1da177e4 LT |
1308 | |
1309 | /* | |
1310 | * We will call the ->create function, that possibly is in a loadable | |
1311 | * module, so we have to bump that loadable module refcnt first. | |
1312 | */ | |
55737fda | 1313 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1314 | goto out_release; |
1315 | ||
55737fda SH |
1316 | /* Now protected by module ref count */ |
1317 | rcu_read_unlock(); | |
1318 | ||
3f378b68 | 1319 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1320 | if (err < 0) |
1da177e4 | 1321 | goto out_module_put; |
a79af59e | 1322 | |
1da177e4 LT |
1323 | /* |
1324 | * Now to bump the refcnt of the [loadable] module that owns this | |
1325 | * socket at sock_release time we decrement its refcnt. | |
1326 | */ | |
55737fda SH |
1327 | if (!try_module_get(sock->ops->owner)) |
1328 | goto out_module_busy; | |
1329 | ||
1da177e4 LT |
1330 | /* |
1331 | * Now that we're done with the ->create function, the [loadable] | |
1332 | * module can have its refcnt decremented | |
1333 | */ | |
55737fda | 1334 | module_put(pf->owner); |
7420ed23 VY |
1335 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1336 | if (err) | |
3b185525 | 1337 | goto out_sock_release; |
55737fda | 1338 | *res = sock; |
1da177e4 | 1339 | |
55737fda SH |
1340 | return 0; |
1341 | ||
1342 | out_module_busy: | |
1343 | err = -EAFNOSUPPORT; | |
1da177e4 | 1344 | out_module_put: |
55737fda SH |
1345 | sock->ops = NULL; |
1346 | module_put(pf->owner); | |
1347 | out_sock_release: | |
1da177e4 | 1348 | sock_release(sock); |
55737fda SH |
1349 | return err; |
1350 | ||
1351 | out_release: | |
1352 | rcu_read_unlock(); | |
1353 | goto out_sock_release; | |
1da177e4 | 1354 | } |
721db93a | 1355 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1356 | |
1357 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1358 | { | |
1b8d7ae4 | 1359 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1360 | } |
c6d409cf | 1361 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1362 | |
1363 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1364 | { | |
1b8d7ae4 | 1365 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1366 | } |
c6d409cf | 1367 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1368 | |
3e0fa65f | 1369 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1370 | { |
1371 | int retval; | |
1372 | struct socket *sock; | |
a677a039 UD |
1373 | int flags; |
1374 | ||
e38b36f3 UD |
1375 | /* Check the SOCK_* constants for consistency. */ |
1376 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1377 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1378 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1379 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1380 | ||
a677a039 | 1381 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1382 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1383 | return -EINVAL; |
1384 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1385 | |
aaca0bdc UD |
1386 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1387 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1388 | ||
1da177e4 LT |
1389 | retval = sock_create(family, type, protocol, &sock); |
1390 | if (retval < 0) | |
1391 | goto out; | |
1392 | ||
77d27200 | 1393 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1394 | if (retval < 0) |
1395 | goto out_release; | |
1396 | ||
1397 | out: | |
1398 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1399 | return retval; | |
1400 | ||
1401 | out_release: | |
1402 | sock_release(sock); | |
1403 | return retval; | |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * Create a pair of connected sockets. | |
1408 | */ | |
1409 | ||
3e0fa65f HC |
1410 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1411 | int __user *, usockvec) | |
1da177e4 LT |
1412 | { |
1413 | struct socket *sock1, *sock2; | |
1414 | int fd1, fd2, err; | |
db349509 | 1415 | struct file *newfile1, *newfile2; |
a677a039 UD |
1416 | int flags; |
1417 | ||
1418 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1419 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1420 | return -EINVAL; |
1421 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1422 | |
aaca0bdc UD |
1423 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1424 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1425 | ||
1da177e4 LT |
1426 | /* |
1427 | * Obtain the first socket and check if the underlying protocol | |
1428 | * supports the socketpair call. | |
1429 | */ | |
1430 | ||
1431 | err = sock_create(family, type, protocol, &sock1); | |
1432 | if (err < 0) | |
1433 | goto out; | |
1434 | ||
1435 | err = sock_create(family, type, protocol, &sock2); | |
1436 | if (err < 0) | |
1437 | goto out_release_1; | |
1438 | ||
1439 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1440 | if (err < 0) |
1da177e4 LT |
1441 | goto out_release_both; |
1442 | ||
28407630 | 1443 | fd1 = get_unused_fd_flags(flags); |
bf3c23d1 DM |
1444 | if (unlikely(fd1 < 0)) { |
1445 | err = fd1; | |
db349509 | 1446 | goto out_release_both; |
bf3c23d1 | 1447 | } |
d73aa286 | 1448 | |
28407630 | 1449 | fd2 = get_unused_fd_flags(flags); |
198de4d7 AV |
1450 | if (unlikely(fd2 < 0)) { |
1451 | err = fd2; | |
d73aa286 | 1452 | goto out_put_unused_1; |
28407630 AV |
1453 | } |
1454 | ||
aab174f0 | 1455 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
28407630 AV |
1456 | if (unlikely(IS_ERR(newfile1))) { |
1457 | err = PTR_ERR(newfile1); | |
d73aa286 | 1458 | goto out_put_unused_both; |
28407630 AV |
1459 | } |
1460 | ||
aab174f0 | 1461 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1462 | if (IS_ERR(newfile2)) { |
1463 | err = PTR_ERR(newfile2); | |
d73aa286 | 1464 | goto out_fput_1; |
db349509 AV |
1465 | } |
1466 | ||
d73aa286 YD |
1467 | err = put_user(fd1, &usockvec[0]); |
1468 | if (err) | |
1469 | goto out_fput_both; | |
1470 | ||
1471 | err = put_user(fd2, &usockvec[1]); | |
1472 | if (err) | |
1473 | goto out_fput_both; | |
1474 | ||
157cf649 | 1475 | audit_fd_pair(fd1, fd2); |
d73aa286 | 1476 | |
db349509 AV |
1477 | fd_install(fd1, newfile1); |
1478 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1479 | /* fd1 and fd2 may be already another descriptors. |
1480 | * Not kernel problem. | |
1481 | */ | |
1482 | ||
d73aa286 | 1483 | return 0; |
1da177e4 | 1484 | |
d73aa286 YD |
1485 | out_fput_both: |
1486 | fput(newfile2); | |
1487 | fput(newfile1); | |
1488 | put_unused_fd(fd2); | |
1489 | put_unused_fd(fd1); | |
1490 | goto out; | |
1491 | ||
1492 | out_fput_1: | |
1493 | fput(newfile1); | |
1494 | put_unused_fd(fd2); | |
1495 | put_unused_fd(fd1); | |
1496 | sock_release(sock2); | |
1497 | goto out; | |
1da177e4 | 1498 | |
d73aa286 YD |
1499 | out_put_unused_both: |
1500 | put_unused_fd(fd2); | |
1501 | out_put_unused_1: | |
1502 | put_unused_fd(fd1); | |
1da177e4 | 1503 | out_release_both: |
89bddce5 | 1504 | sock_release(sock2); |
1da177e4 | 1505 | out_release_1: |
89bddce5 | 1506 | sock_release(sock1); |
1da177e4 LT |
1507 | out: |
1508 | return err; | |
1509 | } | |
1510 | ||
1da177e4 LT |
1511 | /* |
1512 | * Bind a name to a socket. Nothing much to do here since it's | |
1513 | * the protocol's responsibility to handle the local address. | |
1514 | * | |
1515 | * We move the socket address to kernel space before we call | |
1516 | * the protocol layer (having also checked the address is ok). | |
1517 | */ | |
1518 | ||
20f37034 | 1519 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1520 | { |
1521 | struct socket *sock; | |
230b1839 | 1522 | struct sockaddr_storage address; |
6cb153ca | 1523 | int err, fput_needed; |
1da177e4 | 1524 | |
89bddce5 | 1525 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1526 | if (sock) { |
43db362d | 1527 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1528 | if (err >= 0) { |
1529 | err = security_socket_bind(sock, | |
230b1839 | 1530 | (struct sockaddr *)&address, |
89bddce5 | 1531 | addrlen); |
6cb153ca BL |
1532 | if (!err) |
1533 | err = sock->ops->bind(sock, | |
89bddce5 | 1534 | (struct sockaddr *) |
230b1839 | 1535 | &address, addrlen); |
1da177e4 | 1536 | } |
6cb153ca | 1537 | fput_light(sock->file, fput_needed); |
89bddce5 | 1538 | } |
1da177e4 LT |
1539 | return err; |
1540 | } | |
1541 | ||
1da177e4 LT |
1542 | /* |
1543 | * Perform a listen. Basically, we allow the protocol to do anything | |
1544 | * necessary for a listen, and if that works, we mark the socket as | |
1545 | * ready for listening. | |
1546 | */ | |
1547 | ||
3e0fa65f | 1548 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1549 | { |
1550 | struct socket *sock; | |
6cb153ca | 1551 | int err, fput_needed; |
b8e1f9b5 | 1552 | int somaxconn; |
89bddce5 SH |
1553 | |
1554 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1555 | if (sock) { | |
8efa6e93 | 1556 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1557 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1558 | backlog = somaxconn; |
1da177e4 LT |
1559 | |
1560 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1561 | if (!err) |
1562 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1563 | |
6cb153ca | 1564 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1565 | } |
1566 | return err; | |
1567 | } | |
1568 | ||
1da177e4 LT |
1569 | /* |
1570 | * For accept, we attempt to create a new socket, set up the link | |
1571 | * with the client, wake up the client, then return the new | |
1572 | * connected fd. We collect the address of the connector in kernel | |
1573 | * space and move it to user at the very end. This is unclean because | |
1574 | * we open the socket then return an error. | |
1575 | * | |
1576 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1577 | * status to recvmsg. We need to add that support in a way thats | |
1578 | * clean when we restucture accept also. | |
1579 | */ | |
1580 | ||
20f37034 HC |
1581 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1582 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1583 | { |
1584 | struct socket *sock, *newsock; | |
39d8c1b6 | 1585 | struct file *newfile; |
6cb153ca | 1586 | int err, len, newfd, fput_needed; |
230b1839 | 1587 | struct sockaddr_storage address; |
1da177e4 | 1588 | |
77d27200 | 1589 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1590 | return -EINVAL; |
1591 | ||
1592 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1593 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1594 | ||
6cb153ca | 1595 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1596 | if (!sock) |
1597 | goto out; | |
1598 | ||
1599 | err = -ENFILE; | |
c6d409cf ED |
1600 | newsock = sock_alloc(); |
1601 | if (!newsock) | |
1da177e4 LT |
1602 | goto out_put; |
1603 | ||
1604 | newsock->type = sock->type; | |
1605 | newsock->ops = sock->ops; | |
1606 | ||
1da177e4 LT |
1607 | /* |
1608 | * We don't need try_module_get here, as the listening socket (sock) | |
1609 | * has the protocol module (sock->ops->owner) held. | |
1610 | */ | |
1611 | __module_get(newsock->ops->owner); | |
1612 | ||
28407630 | 1613 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1614 | if (unlikely(newfd < 0)) { |
1615 | err = newfd; | |
9a1875e6 DM |
1616 | sock_release(newsock); |
1617 | goto out_put; | |
39d8c1b6 | 1618 | } |
aab174f0 | 1619 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
28407630 AV |
1620 | if (unlikely(IS_ERR(newfile))) { |
1621 | err = PTR_ERR(newfile); | |
1622 | put_unused_fd(newfd); | |
1623 | sock_release(newsock); | |
1624 | goto out_put; | |
1625 | } | |
39d8c1b6 | 1626 | |
a79af59e FF |
1627 | err = security_socket_accept(sock, newsock); |
1628 | if (err) | |
39d8c1b6 | 1629 | goto out_fd; |
a79af59e | 1630 | |
1da177e4 LT |
1631 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1632 | if (err < 0) | |
39d8c1b6 | 1633 | goto out_fd; |
1da177e4 LT |
1634 | |
1635 | if (upeer_sockaddr) { | |
230b1839 | 1636 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1637 | &len, 2) < 0) { |
1da177e4 | 1638 | err = -ECONNABORTED; |
39d8c1b6 | 1639 | goto out_fd; |
1da177e4 | 1640 | } |
43db362d | 1641 | err = move_addr_to_user(&address, |
230b1839 | 1642 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1643 | if (err < 0) |
39d8c1b6 | 1644 | goto out_fd; |
1da177e4 LT |
1645 | } |
1646 | ||
1647 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1648 | ||
39d8c1b6 DM |
1649 | fd_install(newfd, newfile); |
1650 | err = newfd; | |
1da177e4 | 1651 | |
1da177e4 | 1652 | out_put: |
6cb153ca | 1653 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1654 | out: |
1655 | return err; | |
39d8c1b6 | 1656 | out_fd: |
9606a216 | 1657 | fput(newfile); |
39d8c1b6 | 1658 | put_unused_fd(newfd); |
1da177e4 LT |
1659 | goto out_put; |
1660 | } | |
1661 | ||
20f37034 HC |
1662 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1663 | int __user *, upeer_addrlen) | |
aaca0bdc | 1664 | { |
de11defe | 1665 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1666 | } |
1667 | ||
1da177e4 LT |
1668 | /* |
1669 | * Attempt to connect to a socket with the server address. The address | |
1670 | * is in user space so we verify it is OK and move it to kernel space. | |
1671 | * | |
1672 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1673 | * break bindings | |
1674 | * | |
1675 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1676 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1677 | * include the -EINPROGRESS status for such sockets. | |
1678 | */ | |
1679 | ||
20f37034 HC |
1680 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1681 | int, addrlen) | |
1da177e4 LT |
1682 | { |
1683 | struct socket *sock; | |
230b1839 | 1684 | struct sockaddr_storage address; |
6cb153ca | 1685 | int err, fput_needed; |
1da177e4 | 1686 | |
6cb153ca | 1687 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1688 | if (!sock) |
1689 | goto out; | |
43db362d | 1690 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1691 | if (err < 0) |
1692 | goto out_put; | |
1693 | ||
89bddce5 | 1694 | err = |
230b1839 | 1695 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1696 | if (err) |
1697 | goto out_put; | |
1698 | ||
230b1839 | 1699 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1700 | sock->file->f_flags); |
1701 | out_put: | |
6cb153ca | 1702 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1703 | out: |
1704 | return err; | |
1705 | } | |
1706 | ||
1707 | /* | |
1708 | * Get the local address ('name') of a socket object. Move the obtained | |
1709 | * name to user space. | |
1710 | */ | |
1711 | ||
20f37034 HC |
1712 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1713 | int __user *, usockaddr_len) | |
1da177e4 LT |
1714 | { |
1715 | struct socket *sock; | |
230b1839 | 1716 | struct sockaddr_storage address; |
6cb153ca | 1717 | int len, err, fput_needed; |
89bddce5 | 1718 | |
6cb153ca | 1719 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1720 | if (!sock) |
1721 | goto out; | |
1722 | ||
1723 | err = security_socket_getsockname(sock); | |
1724 | if (err) | |
1725 | goto out_put; | |
1726 | ||
230b1839 | 1727 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1728 | if (err) |
1729 | goto out_put; | |
43db362d | 1730 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1731 | |
1732 | out_put: | |
6cb153ca | 1733 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1734 | out: |
1735 | return err; | |
1736 | } | |
1737 | ||
1738 | /* | |
1739 | * Get the remote address ('name') of a socket object. Move the obtained | |
1740 | * name to user space. | |
1741 | */ | |
1742 | ||
20f37034 HC |
1743 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1744 | int __user *, usockaddr_len) | |
1da177e4 LT |
1745 | { |
1746 | struct socket *sock; | |
230b1839 | 1747 | struct sockaddr_storage address; |
6cb153ca | 1748 | int len, err, fput_needed; |
1da177e4 | 1749 | |
89bddce5 SH |
1750 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1751 | if (sock != NULL) { | |
1da177e4 LT |
1752 | err = security_socket_getpeername(sock); |
1753 | if (err) { | |
6cb153ca | 1754 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1755 | return err; |
1756 | } | |
1757 | ||
89bddce5 | 1758 | err = |
230b1839 | 1759 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1760 | 1); |
1da177e4 | 1761 | if (!err) |
43db362d | 1762 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1763 | usockaddr_len); |
6cb153ca | 1764 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1765 | } |
1766 | return err; | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * Send a datagram to a given address. We move the address into kernel | |
1771 | * space and check the user space data area is readable before invoking | |
1772 | * the protocol. | |
1773 | */ | |
1774 | ||
3e0fa65f | 1775 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1776 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1777 | int, addr_len) |
1da177e4 LT |
1778 | { |
1779 | struct socket *sock; | |
230b1839 | 1780 | struct sockaddr_storage address; |
1da177e4 LT |
1781 | int err; |
1782 | struct msghdr msg; | |
1783 | struct iovec iov; | |
6cb153ca | 1784 | int fput_needed; |
6cb153ca | 1785 | |
253eacc0 LT |
1786 | if (len > INT_MAX) |
1787 | len = INT_MAX; | |
de0fa95c PE |
1788 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1789 | if (!sock) | |
4387ff75 | 1790 | goto out; |
6cb153ca | 1791 | |
89bddce5 SH |
1792 | iov.iov_base = buff; |
1793 | iov.iov_len = len; | |
1794 | msg.msg_name = NULL; | |
1795 | msg.msg_iov = &iov; | |
1796 | msg.msg_iovlen = 1; | |
1797 | msg.msg_control = NULL; | |
1798 | msg.msg_controllen = 0; | |
1799 | msg.msg_namelen = 0; | |
6cb153ca | 1800 | if (addr) { |
43db362d | 1801 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1802 | if (err < 0) |
1803 | goto out_put; | |
230b1839 | 1804 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1805 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1806 | } |
1807 | if (sock->file->f_flags & O_NONBLOCK) | |
1808 | flags |= MSG_DONTWAIT; | |
1809 | msg.msg_flags = flags; | |
1810 | err = sock_sendmsg(sock, &msg, len); | |
1811 | ||
89bddce5 | 1812 | out_put: |
de0fa95c | 1813 | fput_light(sock->file, fput_needed); |
4387ff75 | 1814 | out: |
1da177e4 LT |
1815 | return err; |
1816 | } | |
1817 | ||
1818 | /* | |
89bddce5 | 1819 | * Send a datagram down a socket. |
1da177e4 LT |
1820 | */ |
1821 | ||
3e0fa65f | 1822 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1823 | unsigned int, flags) |
1da177e4 LT |
1824 | { |
1825 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1826 | } | |
1827 | ||
1828 | /* | |
89bddce5 | 1829 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1830 | * sender. We verify the buffers are writable and if needed move the |
1831 | * sender address from kernel to user space. | |
1832 | */ | |
1833 | ||
3e0fa65f | 1834 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1835 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1836 | int __user *, addr_len) |
1da177e4 LT |
1837 | { |
1838 | struct socket *sock; | |
1839 | struct iovec iov; | |
1840 | struct msghdr msg; | |
230b1839 | 1841 | struct sockaddr_storage address; |
89bddce5 | 1842 | int err, err2; |
6cb153ca BL |
1843 | int fput_needed; |
1844 | ||
253eacc0 LT |
1845 | if (size > INT_MAX) |
1846 | size = INT_MAX; | |
de0fa95c | 1847 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1848 | if (!sock) |
de0fa95c | 1849 | goto out; |
1da177e4 | 1850 | |
89bddce5 SH |
1851 | msg.msg_control = NULL; |
1852 | msg.msg_controllen = 0; | |
1853 | msg.msg_iovlen = 1; | |
1854 | msg.msg_iov = &iov; | |
1855 | iov.iov_len = size; | |
1856 | iov.iov_base = ubuf; | |
f3d33426 HFS |
1857 | /* Save some cycles and don't copy the address if not needed */ |
1858 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; | |
1859 | /* We assume all kernel code knows the size of sockaddr_storage */ | |
1860 | msg.msg_namelen = 0; | |
1da177e4 LT |
1861 | if (sock->file->f_flags & O_NONBLOCK) |
1862 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1863 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1864 | |
89bddce5 | 1865 | if (err >= 0 && addr != NULL) { |
43db362d | 1866 | err2 = move_addr_to_user(&address, |
230b1839 | 1867 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1868 | if (err2 < 0) |
1869 | err = err2; | |
1da177e4 | 1870 | } |
de0fa95c PE |
1871 | |
1872 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1873 | out: |
1da177e4 LT |
1874 | return err; |
1875 | } | |
1876 | ||
1877 | /* | |
89bddce5 | 1878 | * Receive a datagram from a socket. |
1da177e4 LT |
1879 | */ |
1880 | ||
89bddce5 | 1881 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
95c96174 | 1882 | unsigned int flags) |
1da177e4 LT |
1883 | { |
1884 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1885 | } | |
1886 | ||
1887 | /* | |
1888 | * Set a socket option. Because we don't know the option lengths we have | |
1889 | * to pass the user mode parameter for the protocols to sort out. | |
1890 | */ | |
1891 | ||
20f37034 HC |
1892 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1893 | char __user *, optval, int, optlen) | |
1da177e4 | 1894 | { |
6cb153ca | 1895 | int err, fput_needed; |
1da177e4 LT |
1896 | struct socket *sock; |
1897 | ||
1898 | if (optlen < 0) | |
1899 | return -EINVAL; | |
89bddce5 SH |
1900 | |
1901 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1902 | if (sock != NULL) { | |
1903 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1904 | if (err) |
1905 | goto out_put; | |
1da177e4 LT |
1906 | |
1907 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1908 | err = |
1909 | sock_setsockopt(sock, level, optname, optval, | |
1910 | optlen); | |
1da177e4 | 1911 | else |
89bddce5 SH |
1912 | err = |
1913 | sock->ops->setsockopt(sock, level, optname, optval, | |
1914 | optlen); | |
6cb153ca BL |
1915 | out_put: |
1916 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1917 | } |
1918 | return err; | |
1919 | } | |
1920 | ||
1921 | /* | |
1922 | * Get a socket option. Because we don't know the option lengths we have | |
1923 | * to pass a user mode parameter for the protocols to sort out. | |
1924 | */ | |
1925 | ||
20f37034 HC |
1926 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1927 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1928 | { |
6cb153ca | 1929 | int err, fput_needed; |
1da177e4 LT |
1930 | struct socket *sock; |
1931 | ||
89bddce5 SH |
1932 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1933 | if (sock != NULL) { | |
6cb153ca BL |
1934 | err = security_socket_getsockopt(sock, level, optname); |
1935 | if (err) | |
1936 | goto out_put; | |
1da177e4 LT |
1937 | |
1938 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1939 | err = |
1940 | sock_getsockopt(sock, level, optname, optval, | |
1941 | optlen); | |
1da177e4 | 1942 | else |
89bddce5 SH |
1943 | err = |
1944 | sock->ops->getsockopt(sock, level, optname, optval, | |
1945 | optlen); | |
6cb153ca BL |
1946 | out_put: |
1947 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1948 | } |
1949 | return err; | |
1950 | } | |
1951 | ||
1da177e4 LT |
1952 | /* |
1953 | * Shutdown a socket. | |
1954 | */ | |
1955 | ||
754fe8d2 | 1956 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1957 | { |
6cb153ca | 1958 | int err, fput_needed; |
1da177e4 LT |
1959 | struct socket *sock; |
1960 | ||
89bddce5 SH |
1961 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1962 | if (sock != NULL) { | |
1da177e4 | 1963 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1964 | if (!err) |
1965 | err = sock->ops->shutdown(sock, how); | |
1966 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1967 | } |
1968 | return err; | |
1969 | } | |
1970 | ||
89bddce5 | 1971 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1972 | * fields which are the same type (int / unsigned) on our platforms. |
1973 | */ | |
1974 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1975 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1976 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1977 | ||
c71d8ebe TH |
1978 | struct used_address { |
1979 | struct sockaddr_storage name; | |
1980 | unsigned int name_len; | |
1981 | }; | |
1982 | ||
1661bf36 DC |
1983 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
1984 | struct msghdr __user *umsg) | |
1985 | { | |
1986 | if (copy_from_user(kmsg, umsg, sizeof(struct msghdr))) | |
1987 | return -EFAULT; | |
1988 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) | |
db31c55a | 1989 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
1661bf36 DC |
1990 | return 0; |
1991 | } | |
1992 | ||
a7526eb5 | 1993 | static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 1994 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 1995 | struct used_address *used_address) |
1da177e4 | 1996 | { |
89bddce5 SH |
1997 | struct compat_msghdr __user *msg_compat = |
1998 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1999 | struct sockaddr_storage address; |
1da177e4 | 2000 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 2001 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
2002 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
2003 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 2004 | unsigned char *ctl_buf = ctl; |
a74e9106 | 2005 | int err, ctl_len, total_len; |
89bddce5 | 2006 | |
1da177e4 LT |
2007 | err = -EFAULT; |
2008 | if (MSG_CMSG_COMPAT & flags) { | |
228e548e | 2009 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2010 | return -EFAULT; |
1661bf36 DC |
2011 | } else { |
2012 | err = copy_msghdr_from_user(msg_sys, msg); | |
2013 | if (err) | |
2014 | return err; | |
2015 | } | |
1da177e4 | 2016 | |
228e548e | 2017 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2018 | err = -EMSGSIZE; |
2019 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2020 | goto out; | |
2021 | err = -ENOMEM; | |
2022 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2023 | GFP_KERNEL); | |
1da177e4 | 2024 | if (!iov) |
228e548e | 2025 | goto out; |
1da177e4 LT |
2026 | } |
2027 | ||
2028 | /* This will also move the address data into kernel space */ | |
2029 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 2030 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
1da177e4 | 2031 | } else |
43db362d | 2032 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
89bddce5 | 2033 | if (err < 0) |
1da177e4 LT |
2034 | goto out_freeiov; |
2035 | total_len = err; | |
2036 | ||
2037 | err = -ENOBUFS; | |
2038 | ||
228e548e | 2039 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 2040 | goto out_freeiov; |
228e548e | 2041 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 2042 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 2043 | err = |
228e548e | 2044 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 2045 | sizeof(ctl)); |
1da177e4 LT |
2046 | if (err) |
2047 | goto out_freeiov; | |
228e548e AB |
2048 | ctl_buf = msg_sys->msg_control; |
2049 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 2050 | } else if (ctl_len) { |
89bddce5 | 2051 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 2052 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 2053 | if (ctl_buf == NULL) |
1da177e4 LT |
2054 | goto out_freeiov; |
2055 | } | |
2056 | err = -EFAULT; | |
2057 | /* | |
228e548e | 2058 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2059 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2060 | * checking falls down on this. | |
2061 | */ | |
fb8621bb | 2062 | if (copy_from_user(ctl_buf, |
228e548e | 2063 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2064 | ctl_len)) |
1da177e4 | 2065 | goto out_freectl; |
228e548e | 2066 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2067 | } |
228e548e | 2068 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2069 | |
2070 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2071 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2072 | /* |
2073 | * If this is sendmmsg() and current destination address is same as | |
2074 | * previously succeeded address, omit asking LSM's decision. | |
2075 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2076 | * destination address never matches. | |
2077 | */ | |
bc909d9d MD |
2078 | if (used_address && msg_sys->msg_name && |
2079 | used_address->name_len == msg_sys->msg_namelen && | |
2080 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
2081 | used_address->name_len)) { |
2082 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
2083 | goto out_freectl; | |
2084 | } | |
2085 | err = sock_sendmsg(sock, msg_sys, total_len); | |
2086 | /* | |
2087 | * If this is sendmmsg() and sending to current destination address was | |
2088 | * successful, remember it. | |
2089 | */ | |
2090 | if (used_address && err >= 0) { | |
2091 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2092 | if (msg_sys->msg_name) |
2093 | memcpy(&used_address->name, msg_sys->msg_name, | |
2094 | used_address->name_len); | |
c71d8ebe | 2095 | } |
1da177e4 LT |
2096 | |
2097 | out_freectl: | |
89bddce5 | 2098 | if (ctl_buf != ctl) |
1da177e4 LT |
2099 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2100 | out_freeiov: | |
2101 | if (iov != iovstack) | |
a74e9106 | 2102 | kfree(iov); |
228e548e AB |
2103 | out: |
2104 | return err; | |
2105 | } | |
2106 | ||
2107 | /* | |
2108 | * BSD sendmsg interface | |
2109 | */ | |
2110 | ||
a7526eb5 | 2111 | long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) |
228e548e AB |
2112 | { |
2113 | int fput_needed, err; | |
2114 | struct msghdr msg_sys; | |
1be374a0 AL |
2115 | struct socket *sock; |
2116 | ||
1be374a0 | 2117 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2118 | if (!sock) |
2119 | goto out; | |
2120 | ||
a7526eb5 | 2121 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2122 | |
6cb153ca | 2123 | fput_light(sock->file, fput_needed); |
89bddce5 | 2124 | out: |
1da177e4 LT |
2125 | return err; |
2126 | } | |
2127 | ||
a7526eb5 AL |
2128 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
2129 | { | |
2130 | if (flags & MSG_CMSG_COMPAT) | |
2131 | return -EINVAL; | |
2132 | return __sys_sendmsg(fd, msg, flags); | |
2133 | } | |
2134 | ||
228e548e AB |
2135 | /* |
2136 | * Linux sendmmsg interface | |
2137 | */ | |
2138 | ||
2139 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2140 | unsigned int flags) | |
2141 | { | |
2142 | int fput_needed, err, datagrams; | |
2143 | struct socket *sock; | |
2144 | struct mmsghdr __user *entry; | |
2145 | struct compat_mmsghdr __user *compat_entry; | |
2146 | struct msghdr msg_sys; | |
c71d8ebe | 2147 | struct used_address used_address; |
228e548e | 2148 | |
98382f41 AB |
2149 | if (vlen > UIO_MAXIOV) |
2150 | vlen = UIO_MAXIOV; | |
228e548e AB |
2151 | |
2152 | datagrams = 0; | |
2153 | ||
2154 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2155 | if (!sock) | |
2156 | return err; | |
2157 | ||
c71d8ebe | 2158 | used_address.name_len = UINT_MAX; |
228e548e AB |
2159 | entry = mmsg; |
2160 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2161 | err = 0; |
228e548e AB |
2162 | |
2163 | while (datagrams < vlen) { | |
228e548e | 2164 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2165 | err = ___sys_sendmsg(sock, (struct msghdr __user *)compat_entry, |
2166 | &msg_sys, flags, &used_address); | |
228e548e AB |
2167 | if (err < 0) |
2168 | break; | |
2169 | err = __put_user(err, &compat_entry->msg_len); | |
2170 | ++compat_entry; | |
2171 | } else { | |
a7526eb5 AL |
2172 | err = ___sys_sendmsg(sock, |
2173 | (struct msghdr __user *)entry, | |
2174 | &msg_sys, flags, &used_address); | |
228e548e AB |
2175 | if (err < 0) |
2176 | break; | |
2177 | err = put_user(err, &entry->msg_len); | |
2178 | ++entry; | |
2179 | } | |
2180 | ||
2181 | if (err) | |
2182 | break; | |
2183 | ++datagrams; | |
2184 | } | |
2185 | ||
228e548e AB |
2186 | fput_light(sock->file, fput_needed); |
2187 | ||
728ffb86 AB |
2188 | /* We only return an error if no datagrams were able to be sent */ |
2189 | if (datagrams != 0) | |
228e548e AB |
2190 | return datagrams; |
2191 | ||
228e548e AB |
2192 | return err; |
2193 | } | |
2194 | ||
2195 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2196 | unsigned int, vlen, unsigned int, flags) | |
2197 | { | |
1be374a0 AL |
2198 | if (flags & MSG_CMSG_COMPAT) |
2199 | return -EINVAL; | |
228e548e AB |
2200 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
2201 | } | |
2202 | ||
a7526eb5 | 2203 | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2204 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2205 | { |
89bddce5 SH |
2206 | struct compat_msghdr __user *msg_compat = |
2207 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2208 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2209 | struct iovec *iov = iovstack; |
1da177e4 | 2210 | unsigned long cmsg_ptr; |
a74e9106 | 2211 | int err, total_len, len; |
1da177e4 LT |
2212 | |
2213 | /* kernel mode address */ | |
230b1839 | 2214 | struct sockaddr_storage addr; |
1da177e4 LT |
2215 | |
2216 | /* user mode address pointers */ | |
2217 | struct sockaddr __user *uaddr; | |
2218 | int __user *uaddr_len; | |
89bddce5 | 2219 | |
1da177e4 | 2220 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 2221 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2222 | return -EFAULT; |
1661bf36 DC |
2223 | } else { |
2224 | err = copy_msghdr_from_user(msg_sys, msg); | |
2225 | if (err) | |
2226 | return err; | |
2227 | } | |
1da177e4 | 2228 | |
a2e27255 | 2229 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2230 | err = -EMSGSIZE; |
2231 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2232 | goto out; | |
2233 | err = -ENOMEM; | |
2234 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2235 | GFP_KERNEL); | |
1da177e4 | 2236 | if (!iov) |
a2e27255 | 2237 | goto out; |
1da177e4 LT |
2238 | } |
2239 | ||
f3d33426 HFS |
2240 | /* Save the user-mode address (verify_iovec will change the |
2241 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2242 | */ |
a2e27255 | 2243 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 | 2244 | uaddr_len = COMPAT_NAMELEN(msg); |
f3d33426 | 2245 | if (MSG_CMSG_COMPAT & flags) |
43db362d | 2246 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
f3d33426 | 2247 | else |
43db362d | 2248 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 LT |
2249 | if (err < 0) |
2250 | goto out_freeiov; | |
89bddce5 | 2251 | total_len = err; |
1da177e4 | 2252 | |
a2e27255 ACM |
2253 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2254 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2255 | |
f3d33426 HFS |
2256 | /* We assume all kernel code knows the size of sockaddr_storage */ |
2257 | msg_sys->msg_namelen = 0; | |
2258 | ||
1da177e4 LT |
2259 | if (sock->file->f_flags & O_NONBLOCK) |
2260 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2261 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2262 | total_len, flags); | |
1da177e4 LT |
2263 | if (err < 0) |
2264 | goto out_freeiov; | |
2265 | len = err; | |
2266 | ||
2267 | if (uaddr != NULL) { | |
43db362d | 2268 | err = move_addr_to_user(&addr, |
a2e27255 | 2269 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2270 | uaddr_len); |
1da177e4 LT |
2271 | if (err < 0) |
2272 | goto out_freeiov; | |
2273 | } | |
a2e27255 | 2274 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2275 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2276 | if (err) |
2277 | goto out_freeiov; | |
2278 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2279 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2280 | &msg_compat->msg_controllen); |
2281 | else | |
a2e27255 | 2282 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2283 | &msg->msg_controllen); |
2284 | if (err) | |
2285 | goto out_freeiov; | |
2286 | err = len; | |
2287 | ||
2288 | out_freeiov: | |
2289 | if (iov != iovstack) | |
a74e9106 | 2290 | kfree(iov); |
a2e27255 ACM |
2291 | out: |
2292 | return err; | |
2293 | } | |
2294 | ||
2295 | /* | |
2296 | * BSD recvmsg interface | |
2297 | */ | |
2298 | ||
a7526eb5 | 2299 | long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags) |
a2e27255 ACM |
2300 | { |
2301 | int fput_needed, err; | |
2302 | struct msghdr msg_sys; | |
1be374a0 AL |
2303 | struct socket *sock; |
2304 | ||
1be374a0 | 2305 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2306 | if (!sock) |
2307 | goto out; | |
2308 | ||
a7526eb5 | 2309 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2310 | |
6cb153ca | 2311 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2312 | out: |
2313 | return err; | |
2314 | } | |
2315 | ||
a7526eb5 AL |
2316 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
2317 | unsigned int, flags) | |
2318 | { | |
2319 | if (flags & MSG_CMSG_COMPAT) | |
2320 | return -EINVAL; | |
2321 | return __sys_recvmsg(fd, msg, flags); | |
2322 | } | |
2323 | ||
a2e27255 ACM |
2324 | /* |
2325 | * Linux recvmmsg interface | |
2326 | */ | |
2327 | ||
2328 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2329 | unsigned int flags, struct timespec *timeout) | |
2330 | { | |
2331 | int fput_needed, err, datagrams; | |
2332 | struct socket *sock; | |
2333 | struct mmsghdr __user *entry; | |
d7256d0e | 2334 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2335 | struct msghdr msg_sys; |
2336 | struct timespec end_time; | |
2337 | ||
2338 | if (timeout && | |
2339 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2340 | timeout->tv_nsec)) | |
2341 | return -EINVAL; | |
2342 | ||
2343 | datagrams = 0; | |
2344 | ||
2345 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2346 | if (!sock) | |
2347 | return err; | |
2348 | ||
2349 | err = sock_error(sock->sk); | |
2350 | if (err) | |
2351 | goto out_put; | |
2352 | ||
2353 | entry = mmsg; | |
d7256d0e | 2354 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2355 | |
2356 | while (datagrams < vlen) { | |
2357 | /* | |
2358 | * No need to ask LSM for more than the first datagram. | |
2359 | */ | |
d7256d0e | 2360 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2361 | err = ___sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
2362 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2363 | datagrams); | |
d7256d0e JMG |
2364 | if (err < 0) |
2365 | break; | |
2366 | err = __put_user(err, &compat_entry->msg_len); | |
2367 | ++compat_entry; | |
2368 | } else { | |
a7526eb5 AL |
2369 | err = ___sys_recvmsg(sock, |
2370 | (struct msghdr __user *)entry, | |
2371 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2372 | datagrams); | |
d7256d0e JMG |
2373 | if (err < 0) |
2374 | break; | |
2375 | err = put_user(err, &entry->msg_len); | |
2376 | ++entry; | |
2377 | } | |
2378 | ||
a2e27255 ACM |
2379 | if (err) |
2380 | break; | |
a2e27255 ACM |
2381 | ++datagrams; |
2382 | ||
71c5c159 BB |
2383 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2384 | if (flags & MSG_WAITFORONE) | |
2385 | flags |= MSG_DONTWAIT; | |
2386 | ||
a2e27255 ACM |
2387 | if (timeout) { |
2388 | ktime_get_ts(timeout); | |
2389 | *timeout = timespec_sub(end_time, *timeout); | |
2390 | if (timeout->tv_sec < 0) { | |
2391 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2392 | break; | |
2393 | } | |
2394 | ||
2395 | /* Timeout, return less than vlen datagrams */ | |
2396 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2397 | break; | |
2398 | } | |
2399 | ||
2400 | /* Out of band data, return right away */ | |
2401 | if (msg_sys.msg_flags & MSG_OOB) | |
2402 | break; | |
2403 | } | |
2404 | ||
2405 | out_put: | |
2406 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2407 | |
a2e27255 ACM |
2408 | if (err == 0) |
2409 | return datagrams; | |
2410 | ||
2411 | if (datagrams != 0) { | |
2412 | /* | |
2413 | * We may return less entries than requested (vlen) if the | |
2414 | * sock is non block and there aren't enough datagrams... | |
2415 | */ | |
2416 | if (err != -EAGAIN) { | |
2417 | /* | |
2418 | * ... or if recvmsg returns an error after we | |
2419 | * received some datagrams, where we record the | |
2420 | * error to return on the next call or if the | |
2421 | * app asks about it using getsockopt(SO_ERROR). | |
2422 | */ | |
2423 | sock->sk->sk_err = -err; | |
2424 | } | |
2425 | ||
2426 | return datagrams; | |
2427 | } | |
2428 | ||
2429 | return err; | |
2430 | } | |
2431 | ||
2432 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2433 | unsigned int, vlen, unsigned int, flags, | |
2434 | struct timespec __user *, timeout) | |
2435 | { | |
2436 | int datagrams; | |
2437 | struct timespec timeout_sys; | |
2438 | ||
1be374a0 AL |
2439 | if (flags & MSG_CMSG_COMPAT) |
2440 | return -EINVAL; | |
2441 | ||
a2e27255 ACM |
2442 | if (!timeout) |
2443 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2444 | ||
2445 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2446 | return -EFAULT; | |
2447 | ||
2448 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2449 | ||
2450 | if (datagrams > 0 && | |
2451 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2452 | datagrams = -EFAULT; | |
2453 | ||
2454 | return datagrams; | |
2455 | } | |
2456 | ||
2457 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2458 | /* Argument list sizes for sys_socketcall */ |
2459 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2460 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2461 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2462 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2463 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2464 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2465 | }; |
2466 | ||
1da177e4 LT |
2467 | #undef AL |
2468 | ||
2469 | /* | |
89bddce5 | 2470 | * System call vectors. |
1da177e4 LT |
2471 | * |
2472 | * Argument checking cleaned up. Saved 20% in size. | |
2473 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2474 | * it is set by the callees. |
1da177e4 LT |
2475 | */ |
2476 | ||
3e0fa65f | 2477 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2478 | { |
2950fa9d | 2479 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2480 | unsigned long a0, a1; |
1da177e4 | 2481 | int err; |
47379052 | 2482 | unsigned int len; |
1da177e4 | 2483 | |
228e548e | 2484 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2485 | return -EINVAL; |
2486 | ||
47379052 AV |
2487 | len = nargs[call]; |
2488 | if (len > sizeof(a)) | |
2489 | return -EINVAL; | |
2490 | ||
1da177e4 | 2491 | /* copy_from_user should be SMP safe. */ |
47379052 | 2492 | if (copy_from_user(a, args, len)) |
1da177e4 | 2493 | return -EFAULT; |
3ec3b2fb | 2494 | |
2950fa9d CG |
2495 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2496 | if (err) | |
2497 | return err; | |
3ec3b2fb | 2498 | |
89bddce5 SH |
2499 | a0 = a[0]; |
2500 | a1 = a[1]; | |
2501 | ||
2502 | switch (call) { | |
2503 | case SYS_SOCKET: | |
2504 | err = sys_socket(a0, a1, a[2]); | |
2505 | break; | |
2506 | case SYS_BIND: | |
2507 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2508 | break; | |
2509 | case SYS_CONNECT: | |
2510 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2511 | break; | |
2512 | case SYS_LISTEN: | |
2513 | err = sys_listen(a0, a1); | |
2514 | break; | |
2515 | case SYS_ACCEPT: | |
de11defe UD |
2516 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2517 | (int __user *)a[2], 0); | |
89bddce5 SH |
2518 | break; |
2519 | case SYS_GETSOCKNAME: | |
2520 | err = | |
2521 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2522 | (int __user *)a[2]); | |
2523 | break; | |
2524 | case SYS_GETPEERNAME: | |
2525 | err = | |
2526 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2527 | (int __user *)a[2]); | |
2528 | break; | |
2529 | case SYS_SOCKETPAIR: | |
2530 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2531 | break; | |
2532 | case SYS_SEND: | |
2533 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2534 | break; | |
2535 | case SYS_SENDTO: | |
2536 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2537 | (struct sockaddr __user *)a[4], a[5]); | |
2538 | break; | |
2539 | case SYS_RECV: | |
2540 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2541 | break; | |
2542 | case SYS_RECVFROM: | |
2543 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2544 | (struct sockaddr __user *)a[4], | |
2545 | (int __user *)a[5]); | |
2546 | break; | |
2547 | case SYS_SHUTDOWN: | |
2548 | err = sys_shutdown(a0, a1); | |
2549 | break; | |
2550 | case SYS_SETSOCKOPT: | |
2551 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2552 | break; | |
2553 | case SYS_GETSOCKOPT: | |
2554 | err = | |
2555 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2556 | (int __user *)a[4]); | |
2557 | break; | |
2558 | case SYS_SENDMSG: | |
2559 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2560 | break; | |
228e548e AB |
2561 | case SYS_SENDMMSG: |
2562 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2563 | break; | |
89bddce5 SH |
2564 | case SYS_RECVMSG: |
2565 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2566 | break; | |
a2e27255 ACM |
2567 | case SYS_RECVMMSG: |
2568 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2569 | (struct timespec __user *)a[4]); | |
2570 | break; | |
de11defe UD |
2571 | case SYS_ACCEPT4: |
2572 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2573 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2574 | break; |
89bddce5 SH |
2575 | default: |
2576 | err = -EINVAL; | |
2577 | break; | |
1da177e4 LT |
2578 | } |
2579 | return err; | |
2580 | } | |
2581 | ||
89bddce5 | 2582 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2583 | |
55737fda SH |
2584 | /** |
2585 | * sock_register - add a socket protocol handler | |
2586 | * @ops: description of protocol | |
2587 | * | |
1da177e4 LT |
2588 | * This function is called by a protocol handler that wants to |
2589 | * advertise its address family, and have it linked into the | |
55737fda SH |
2590 | * socket interface. The value ops->family coresponds to the |
2591 | * socket system call protocol family. | |
1da177e4 | 2592 | */ |
f0fd27d4 | 2593 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2594 | { |
2595 | int err; | |
2596 | ||
2597 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2598 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2599 | NPROTO); | |
1da177e4 LT |
2600 | return -ENOBUFS; |
2601 | } | |
55737fda SH |
2602 | |
2603 | spin_lock(&net_family_lock); | |
190683a9 ED |
2604 | if (rcu_dereference_protected(net_families[ops->family], |
2605 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2606 | err = -EEXIST; |
2607 | else { | |
cf778b00 | 2608 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2609 | err = 0; |
2610 | } | |
55737fda SH |
2611 | spin_unlock(&net_family_lock); |
2612 | ||
89bddce5 | 2613 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2614 | return err; |
2615 | } | |
c6d409cf | 2616 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2617 | |
55737fda SH |
2618 | /** |
2619 | * sock_unregister - remove a protocol handler | |
2620 | * @family: protocol family to remove | |
2621 | * | |
1da177e4 LT |
2622 | * This function is called by a protocol handler that wants to |
2623 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2624 | * new socket creation. |
2625 | * | |
2626 | * If protocol handler is a module, then it can use module reference | |
2627 | * counts to protect against new references. If protocol handler is not | |
2628 | * a module then it needs to provide its own protection in | |
2629 | * the ops->create routine. | |
1da177e4 | 2630 | */ |
f0fd27d4 | 2631 | void sock_unregister(int family) |
1da177e4 | 2632 | { |
f0fd27d4 | 2633 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2634 | |
55737fda | 2635 | spin_lock(&net_family_lock); |
a9b3cd7f | 2636 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2637 | spin_unlock(&net_family_lock); |
2638 | ||
2639 | synchronize_rcu(); | |
2640 | ||
89bddce5 | 2641 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2642 | } |
c6d409cf | 2643 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2644 | |
77d76ea3 | 2645 | static int __init sock_init(void) |
1da177e4 | 2646 | { |
b3e19d92 | 2647 | int err; |
2ca794e5 EB |
2648 | /* |
2649 | * Initialize the network sysctl infrastructure. | |
2650 | */ | |
2651 | err = net_sysctl_init(); | |
2652 | if (err) | |
2653 | goto out; | |
b3e19d92 | 2654 | |
1da177e4 | 2655 | /* |
89bddce5 | 2656 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2657 | */ |
2658 | skb_init(); | |
1da177e4 LT |
2659 | |
2660 | /* | |
89bddce5 | 2661 | * Initialize the protocols module. |
1da177e4 LT |
2662 | */ |
2663 | ||
2664 | init_inodecache(); | |
b3e19d92 NP |
2665 | |
2666 | err = register_filesystem(&sock_fs_type); | |
2667 | if (err) | |
2668 | goto out_fs; | |
1da177e4 | 2669 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2670 | if (IS_ERR(sock_mnt)) { |
2671 | err = PTR_ERR(sock_mnt); | |
2672 | goto out_mount; | |
2673 | } | |
77d76ea3 AK |
2674 | |
2675 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2676 | */ |
2677 | ||
2678 | #ifdef CONFIG_NETFILTER | |
6d11cfdb PNA |
2679 | err = netfilter_init(); |
2680 | if (err) | |
2681 | goto out; | |
1da177e4 | 2682 | #endif |
cbeb321a | 2683 | |
c1f19b51 RC |
2684 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
2685 | skb_timestamping_init(); | |
2686 | #endif | |
2687 | ||
b3e19d92 NP |
2688 | out: |
2689 | return err; | |
2690 | ||
2691 | out_mount: | |
2692 | unregister_filesystem(&sock_fs_type); | |
2693 | out_fs: | |
2694 | goto out; | |
1da177e4 LT |
2695 | } |
2696 | ||
77d76ea3 AK |
2697 | core_initcall(sock_init); /* early initcall */ |
2698 | ||
1da177e4 LT |
2699 | #ifdef CONFIG_PROC_FS |
2700 | void socket_seq_show(struct seq_file *seq) | |
2701 | { | |
2702 | int cpu; | |
2703 | int counter = 0; | |
2704 | ||
6f912042 | 2705 | for_each_possible_cpu(cpu) |
89bddce5 | 2706 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2707 | |
2708 | /* It can be negative, by the way. 8) */ | |
2709 | if (counter < 0) | |
2710 | counter = 0; | |
2711 | ||
2712 | seq_printf(seq, "sockets: used %d\n", counter); | |
2713 | } | |
89bddce5 | 2714 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2715 | |
89bbfc95 | 2716 | #ifdef CONFIG_COMPAT |
6b96018b | 2717 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2718 | unsigned int cmd, void __user *up) |
7a229387 | 2719 | { |
7a229387 AB |
2720 | mm_segment_t old_fs = get_fs(); |
2721 | struct timeval ktv; | |
2722 | int err; | |
2723 | ||
2724 | set_fs(KERNEL_DS); | |
6b96018b | 2725 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2726 | set_fs(old_fs); |
644595f8 | 2727 | if (!err) |
ed6fe9d6 | 2728 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2729 | |
7a229387 AB |
2730 | return err; |
2731 | } | |
2732 | ||
6b96018b | 2733 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2734 | unsigned int cmd, void __user *up) |
7a229387 | 2735 | { |
7a229387 AB |
2736 | mm_segment_t old_fs = get_fs(); |
2737 | struct timespec kts; | |
2738 | int err; | |
2739 | ||
2740 | set_fs(KERNEL_DS); | |
6b96018b | 2741 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2742 | set_fs(old_fs); |
644595f8 | 2743 | if (!err) |
ed6fe9d6 | 2744 | err = compat_put_timespec(&kts, up); |
644595f8 | 2745 | |
7a229387 AB |
2746 | return err; |
2747 | } | |
2748 | ||
6b96018b | 2749 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2750 | { |
2751 | struct ifreq __user *uifr; | |
2752 | int err; | |
2753 | ||
2754 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2755 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2756 | return -EFAULT; |
2757 | ||
6b96018b | 2758 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2759 | if (err) |
2760 | return err; | |
2761 | ||
6b96018b | 2762 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2763 | return -EFAULT; |
2764 | ||
2765 | return 0; | |
2766 | } | |
2767 | ||
6b96018b | 2768 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2769 | { |
6b96018b | 2770 | struct compat_ifconf ifc32; |
7a229387 AB |
2771 | struct ifconf ifc; |
2772 | struct ifconf __user *uifc; | |
6b96018b | 2773 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2774 | struct ifreq __user *ifr; |
2775 | unsigned int i, j; | |
2776 | int err; | |
2777 | ||
6b96018b | 2778 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2779 | return -EFAULT; |
2780 | ||
43da5f2e | 2781 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2782 | if (ifc32.ifcbuf == 0) { |
2783 | ifc32.ifc_len = 0; | |
2784 | ifc.ifc_len = 0; | |
2785 | ifc.ifc_req = NULL; | |
2786 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2787 | } else { | |
c6d409cf ED |
2788 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2789 | sizeof(struct ifreq); | |
7a229387 AB |
2790 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2791 | ifc.ifc_len = len; | |
2792 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2793 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2794 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2795 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2796 | return -EFAULT; |
2797 | ifr++; | |
2798 | ifr32++; | |
2799 | } | |
2800 | } | |
2801 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2802 | return -EFAULT; | |
2803 | ||
6b96018b | 2804 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2805 | if (err) |
2806 | return err; | |
2807 | ||
2808 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2809 | return -EFAULT; | |
2810 | ||
2811 | ifr = ifc.ifc_req; | |
2812 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2813 | for (i = 0, j = 0; | |
c6d409cf ED |
2814 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2815 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2816 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2817 | return -EFAULT; |
2818 | ifr32++; | |
2819 | ifr++; | |
2820 | } | |
2821 | ||
2822 | if (ifc32.ifcbuf == 0) { | |
2823 | /* Translate from 64-bit structure multiple to | |
2824 | * a 32-bit one. | |
2825 | */ | |
2826 | i = ifc.ifc_len; | |
6b96018b | 2827 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2828 | ifc32.ifc_len = i; |
2829 | } else { | |
2830 | ifc32.ifc_len = i; | |
2831 | } | |
6b96018b | 2832 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2833 | return -EFAULT; |
2834 | ||
2835 | return 0; | |
2836 | } | |
2837 | ||
6b96018b | 2838 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2839 | { |
3a7da39d BH |
2840 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2841 | bool convert_in = false, convert_out = false; | |
2842 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2843 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2844 | struct ifreq __user *ifr; |
3a7da39d BH |
2845 | u32 rule_cnt = 0, actual_rule_cnt; |
2846 | u32 ethcmd; | |
7a229387 | 2847 | u32 data; |
3a7da39d | 2848 | int ret; |
7a229387 | 2849 | |
3a7da39d BH |
2850 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2851 | return -EFAULT; | |
7a229387 | 2852 | |
3a7da39d BH |
2853 | compat_rxnfc = compat_ptr(data); |
2854 | ||
2855 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2856 | return -EFAULT; |
2857 | ||
3a7da39d BH |
2858 | /* Most ethtool structures are defined without padding. |
2859 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2860 | */ | |
2861 | switch (ethcmd) { | |
2862 | default: | |
2863 | break; | |
2864 | case ETHTOOL_GRXCLSRLALL: | |
2865 | /* Buffer size is variable */ | |
2866 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2867 | return -EFAULT; | |
2868 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2869 | return -ENOMEM; | |
2870 | buf_size += rule_cnt * sizeof(u32); | |
2871 | /* fall through */ | |
2872 | case ETHTOOL_GRXRINGS: | |
2873 | case ETHTOOL_GRXCLSRLCNT: | |
2874 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2875 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2876 | convert_out = true; |
2877 | /* fall through */ | |
2878 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2879 | buf_size += sizeof(struct ethtool_rxnfc); |
2880 | convert_in = true; | |
2881 | break; | |
2882 | } | |
2883 | ||
2884 | ifr = compat_alloc_user_space(buf_size); | |
954b1244 | 2885 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d BH |
2886 | |
2887 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2888 | return -EFAULT; |
2889 | ||
3a7da39d BH |
2890 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2891 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2892 | return -EFAULT; |
2893 | ||
3a7da39d | 2894 | if (convert_in) { |
127fe533 | 2895 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2896 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2897 | */ | |
127fe533 AD |
2898 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2899 | sizeof(compat_rxnfc->fs.m_ext) != | |
2900 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2901 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2902 | BUILD_BUG_ON( |
2903 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2904 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2905 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2906 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2907 | ||
2908 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2909 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2910 | (void __user *)rxnfc) || | |
3a7da39d BH |
2911 | copy_in_user(&rxnfc->fs.ring_cookie, |
2912 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2913 | (void __user *)(&rxnfc->fs.location + 1) - |
2914 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2915 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2916 | sizeof(rxnfc->rule_cnt))) | |
2917 | return -EFAULT; | |
2918 | } | |
2919 | ||
2920 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2921 | if (ret) | |
2922 | return ret; | |
2923 | ||
2924 | if (convert_out) { | |
2925 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2926 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2927 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2928 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2929 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2930 | (const void __user *)(&rxnfc->fs.location + 1) - |
2931 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2932 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2933 | sizeof(rxnfc->rule_cnt))) | |
2934 | return -EFAULT; | |
2935 | ||
2936 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2937 | /* As an optimisation, we only copy the actual | |
2938 | * number of rules that the underlying | |
2939 | * function returned. Since Mallory might | |
2940 | * change the rule count in user memory, we | |
2941 | * check that it is less than the rule count | |
2942 | * originally given (as the user buffer size), | |
2943 | * which has been range-checked. | |
2944 | */ | |
2945 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2946 | return -EFAULT; | |
2947 | if (actual_rule_cnt < rule_cnt) | |
2948 | rule_cnt = actual_rule_cnt; | |
2949 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2950 | &rxnfc->rule_locs[0], | |
2951 | rule_cnt * sizeof(u32))) | |
2952 | return -EFAULT; | |
2953 | } | |
2954 | } | |
2955 | ||
2956 | return 0; | |
7a229387 AB |
2957 | } |
2958 | ||
7a50a240 AB |
2959 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2960 | { | |
2961 | void __user *uptr; | |
2962 | compat_uptr_t uptr32; | |
2963 | struct ifreq __user *uifr; | |
2964 | ||
c6d409cf | 2965 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2966 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2967 | return -EFAULT; | |
2968 | ||
2969 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2970 | return -EFAULT; | |
2971 | ||
2972 | uptr = compat_ptr(uptr32); | |
2973 | ||
2974 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2975 | return -EFAULT; | |
2976 | ||
2977 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2978 | } | |
2979 | ||
6b96018b AB |
2980 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2981 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2982 | { |
2983 | struct ifreq kifr; | |
7a229387 AB |
2984 | mm_segment_t old_fs; |
2985 | int err; | |
7a229387 AB |
2986 | |
2987 | switch (cmd) { | |
2988 | case SIOCBONDENSLAVE: | |
2989 | case SIOCBONDRELEASE: | |
2990 | case SIOCBONDSETHWADDR: | |
2991 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2992 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2993 | return -EFAULT; |
2994 | ||
2995 | old_fs = get_fs(); | |
c6d409cf | 2996 | set_fs(KERNEL_DS); |
c3f52ae6 | 2997 | err = dev_ioctl(net, cmd, |
2998 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2999 | set_fs(old_fs); |
7a229387 AB |
3000 | |
3001 | return err; | |
7a229387 | 3002 | default: |
07d106d0 | 3003 | return -ENOIOCTLCMD; |
ccbd6a5a | 3004 | } |
7a229387 AB |
3005 | } |
3006 | ||
590d4693 BH |
3007 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
3008 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, | |
6b96018b | 3009 | struct compat_ifreq __user *u_ifreq32) |
7a229387 AB |
3010 | { |
3011 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
3012 | char tmp_buf[IFNAMSIZ]; |
3013 | void __user *data64; | |
3014 | u32 data32; | |
3015 | ||
3016 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
3017 | IFNAMSIZ)) | |
3018 | return -EFAULT; | |
417c3522 | 3019 | if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
7a229387 AB |
3020 | return -EFAULT; |
3021 | data64 = compat_ptr(data32); | |
3022 | ||
3023 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
3024 | ||
7a229387 AB |
3025 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
3026 | IFNAMSIZ)) | |
3027 | return -EFAULT; | |
417c3522 | 3028 | if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
7a229387 AB |
3029 | return -EFAULT; |
3030 | ||
6b96018b | 3031 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
3032 | } |
3033 | ||
6b96018b AB |
3034 | static int dev_ifsioc(struct net *net, struct socket *sock, |
3035 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 3036 | { |
a2116ed2 | 3037 | struct ifreq __user *uifr; |
7a229387 AB |
3038 | int err; |
3039 | ||
a2116ed2 AB |
3040 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
3041 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
3042 | return -EFAULT; | |
3043 | ||
3044 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
3045 | ||
7a229387 AB |
3046 | if (!err) { |
3047 | switch (cmd) { | |
3048 | case SIOCGIFFLAGS: | |
3049 | case SIOCGIFMETRIC: | |
3050 | case SIOCGIFMTU: | |
3051 | case SIOCGIFMEM: | |
3052 | case SIOCGIFHWADDR: | |
3053 | case SIOCGIFINDEX: | |
3054 | case SIOCGIFADDR: | |
3055 | case SIOCGIFBRDADDR: | |
3056 | case SIOCGIFDSTADDR: | |
3057 | case SIOCGIFNETMASK: | |
fab2532b | 3058 | case SIOCGIFPFLAGS: |
7a229387 | 3059 | case SIOCGIFTXQLEN: |
fab2532b AB |
3060 | case SIOCGMIIPHY: |
3061 | case SIOCGMIIREG: | |
a2116ed2 | 3062 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
3063 | err = -EFAULT; |
3064 | break; | |
3065 | } | |
3066 | } | |
3067 | return err; | |
3068 | } | |
3069 | ||
a2116ed2 AB |
3070 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
3071 | struct compat_ifreq __user *uifr32) | |
3072 | { | |
3073 | struct ifreq ifr; | |
3074 | struct compat_ifmap __user *uifmap32; | |
3075 | mm_segment_t old_fs; | |
3076 | int err; | |
3077 | ||
3078 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3079 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3080 | err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3081 | err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3082 | err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3083 | err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3084 | err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3085 | err |= get_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3086 | if (err) |
3087 | return -EFAULT; | |
3088 | ||
3089 | old_fs = get_fs(); | |
c6d409cf | 3090 | set_fs(KERNEL_DS); |
c3f52ae6 | 3091 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3092 | set_fs(old_fs); |
a2116ed2 AB |
3093 | |
3094 | if (cmd == SIOCGIFMAP && !err) { | |
3095 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3096 | err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3097 | err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3098 | err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3099 | err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3100 | err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3101 | err |= put_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3102 | if (err) |
3103 | err = -EFAULT; | |
3104 | } | |
3105 | return err; | |
3106 | } | |
3107 | ||
7a229387 | 3108 | struct rtentry32 { |
c6d409cf | 3109 | u32 rt_pad1; |
7a229387 AB |
3110 | struct sockaddr rt_dst; /* target address */ |
3111 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3112 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3113 | unsigned short rt_flags; |
3114 | short rt_pad2; | |
3115 | u32 rt_pad3; | |
3116 | unsigned char rt_tos; | |
3117 | unsigned char rt_class; | |
3118 | short rt_pad4; | |
3119 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3120 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3121 | u32 rt_mtu; /* per route MTU/Window */ |
3122 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3123 | unsigned short rt_irtt; /* Initial RTT */ |
3124 | }; | |
3125 | ||
3126 | struct in6_rtmsg32 { | |
3127 | struct in6_addr rtmsg_dst; | |
3128 | struct in6_addr rtmsg_src; | |
3129 | struct in6_addr rtmsg_gateway; | |
3130 | u32 rtmsg_type; | |
3131 | u16 rtmsg_dst_len; | |
3132 | u16 rtmsg_src_len; | |
3133 | u32 rtmsg_metric; | |
3134 | u32 rtmsg_info; | |
3135 | u32 rtmsg_flags; | |
3136 | s32 rtmsg_ifindex; | |
3137 | }; | |
3138 | ||
6b96018b AB |
3139 | static int routing_ioctl(struct net *net, struct socket *sock, |
3140 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3141 | { |
3142 | int ret; | |
3143 | void *r = NULL; | |
3144 | struct in6_rtmsg r6; | |
3145 | struct rtentry r4; | |
3146 | char devname[16]; | |
3147 | u32 rtdev; | |
3148 | mm_segment_t old_fs = get_fs(); | |
3149 | ||
6b96018b AB |
3150 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3151 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3152 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3153 | 3 * sizeof(struct in6_addr)); |
3ddc5b46 MD |
3154 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3155 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3156 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3157 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3158 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3159 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3160 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3161 | |
3162 | r = (void *) &r6; | |
3163 | } else { /* ipv4 */ | |
6b96018b | 3164 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3165 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3166 | 3 * sizeof(struct sockaddr)); |
3ddc5b46 MD |
3167 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
3168 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3169 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3170 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); | |
3171 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3172 | ret |= get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3173 | if (rtdev) { |
c6d409cf | 3174 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3175 | r4.rt_dev = (char __user __force *)devname; |
3176 | devname[15] = 0; | |
7a229387 AB |
3177 | } else |
3178 | r4.rt_dev = NULL; | |
3179 | ||
3180 | r = (void *) &r4; | |
3181 | } | |
3182 | ||
3183 | if (ret) { | |
3184 | ret = -EFAULT; | |
3185 | goto out; | |
3186 | } | |
3187 | ||
c6d409cf | 3188 | set_fs(KERNEL_DS); |
6b96018b | 3189 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3190 | set_fs(old_fs); |
7a229387 AB |
3191 | |
3192 | out: | |
7a229387 AB |
3193 | return ret; |
3194 | } | |
3195 | ||
3196 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3197 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3198 | * use compatible ioctls |
7a229387 | 3199 | */ |
6b96018b | 3200 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3201 | { |
6b96018b | 3202 | compat_ulong_t tmp; |
7a229387 | 3203 | |
6b96018b | 3204 | if (get_user(tmp, argp)) |
7a229387 AB |
3205 | return -EFAULT; |
3206 | if (tmp == BRCTL_GET_VERSION) | |
3207 | return BRCTL_VERSION + 1; | |
3208 | return -EINVAL; | |
3209 | } | |
3210 | ||
6b96018b AB |
3211 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3212 | unsigned int cmd, unsigned long arg) | |
3213 | { | |
3214 | void __user *argp = compat_ptr(arg); | |
3215 | struct sock *sk = sock->sk; | |
3216 | struct net *net = sock_net(sk); | |
7a229387 | 3217 | |
6b96018b | 3218 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
590d4693 | 3219 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3220 | |
3221 | switch (cmd) { | |
3222 | case SIOCSIFBR: | |
3223 | case SIOCGIFBR: | |
3224 | return old_bridge_ioctl(argp); | |
3225 | case SIOCGIFNAME: | |
3226 | return dev_ifname32(net, argp); | |
3227 | case SIOCGIFCONF: | |
3228 | return dev_ifconf(net, argp); | |
3229 | case SIOCETHTOOL: | |
3230 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3231 | case SIOCWANDEV: |
3232 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3233 | case SIOCGIFMAP: |
3234 | case SIOCSIFMAP: | |
3235 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3236 | case SIOCBONDENSLAVE: |
3237 | case SIOCBONDRELEASE: | |
3238 | case SIOCBONDSETHWADDR: | |
6b96018b AB |
3239 | case SIOCBONDCHANGEACTIVE: |
3240 | return bond_ioctl(net, cmd, argp); | |
3241 | case SIOCADDRT: | |
3242 | case SIOCDELRT: | |
3243 | return routing_ioctl(net, sock, cmd, argp); | |
3244 | case SIOCGSTAMP: | |
3245 | return do_siocgstamp(net, sock, cmd, argp); | |
3246 | case SIOCGSTAMPNS: | |
3247 | return do_siocgstampns(net, sock, cmd, argp); | |
590d4693 BH |
3248 | case SIOCBONDSLAVEINFOQUERY: |
3249 | case SIOCBONDINFOQUERY: | |
a2116ed2 | 3250 | case SIOCSHWTSTAMP: |
fd468c74 | 3251 | case SIOCGHWTSTAMP: |
590d4693 | 3252 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3253 | |
3254 | case FIOSETOWN: | |
3255 | case SIOCSPGRP: | |
3256 | case FIOGETOWN: | |
3257 | case SIOCGPGRP: | |
3258 | case SIOCBRADDBR: | |
3259 | case SIOCBRDELBR: | |
3260 | case SIOCGIFVLAN: | |
3261 | case SIOCSIFVLAN: | |
3262 | case SIOCADDDLCI: | |
3263 | case SIOCDELDLCI: | |
3264 | return sock_ioctl(file, cmd, arg); | |
3265 | ||
3266 | case SIOCGIFFLAGS: | |
3267 | case SIOCSIFFLAGS: | |
3268 | case SIOCGIFMETRIC: | |
3269 | case SIOCSIFMETRIC: | |
3270 | case SIOCGIFMTU: | |
3271 | case SIOCSIFMTU: | |
3272 | case SIOCGIFMEM: | |
3273 | case SIOCSIFMEM: | |
3274 | case SIOCGIFHWADDR: | |
3275 | case SIOCSIFHWADDR: | |
3276 | case SIOCADDMULTI: | |
3277 | case SIOCDELMULTI: | |
3278 | case SIOCGIFINDEX: | |
6b96018b AB |
3279 | case SIOCGIFADDR: |
3280 | case SIOCSIFADDR: | |
3281 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3282 | case SIOCDIFADDR: |
6b96018b AB |
3283 | case SIOCGIFBRDADDR: |
3284 | case SIOCSIFBRDADDR: | |
3285 | case SIOCGIFDSTADDR: | |
3286 | case SIOCSIFDSTADDR: | |
3287 | case SIOCGIFNETMASK: | |
3288 | case SIOCSIFNETMASK: | |
3289 | case SIOCSIFPFLAGS: | |
3290 | case SIOCGIFPFLAGS: | |
3291 | case SIOCGIFTXQLEN: | |
3292 | case SIOCSIFTXQLEN: | |
3293 | case SIOCBRADDIF: | |
3294 | case SIOCBRDELIF: | |
9177efd3 AB |
3295 | case SIOCSIFNAME: |
3296 | case SIOCGMIIPHY: | |
3297 | case SIOCGMIIREG: | |
3298 | case SIOCSMIIREG: | |
6b96018b | 3299 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3300 | |
6b96018b AB |
3301 | case SIOCSARP: |
3302 | case SIOCGARP: | |
3303 | case SIOCDARP: | |
6b96018b | 3304 | case SIOCATMARK: |
9177efd3 AB |
3305 | return sock_do_ioctl(net, sock, cmd, arg); |
3306 | } | |
3307 | ||
6b96018b AB |
3308 | return -ENOIOCTLCMD; |
3309 | } | |
7a229387 | 3310 | |
95c96174 | 3311 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3312 | unsigned long arg) |
89bbfc95 SP |
3313 | { |
3314 | struct socket *sock = file->private_data; | |
3315 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3316 | struct sock *sk; |
3317 | struct net *net; | |
3318 | ||
3319 | sk = sock->sk; | |
3320 | net = sock_net(sk); | |
89bbfc95 SP |
3321 | |
3322 | if (sock->ops->compat_ioctl) | |
3323 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3324 | ||
87de87d5 DM |
3325 | if (ret == -ENOIOCTLCMD && |
3326 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3327 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3328 | ||
6b96018b AB |
3329 | if (ret == -ENOIOCTLCMD) |
3330 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3331 | ||
89bbfc95 SP |
3332 | return ret; |
3333 | } | |
3334 | #endif | |
3335 | ||
ac5a488e SS |
3336 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3337 | { | |
3338 | return sock->ops->bind(sock, addr, addrlen); | |
3339 | } | |
c6d409cf | 3340 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3341 | |
3342 | int kernel_listen(struct socket *sock, int backlog) | |
3343 | { | |
3344 | return sock->ops->listen(sock, backlog); | |
3345 | } | |
c6d409cf | 3346 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3347 | |
3348 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3349 | { | |
3350 | struct sock *sk = sock->sk; | |
3351 | int err; | |
3352 | ||
3353 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3354 | newsock); | |
3355 | if (err < 0) | |
3356 | goto done; | |
3357 | ||
3358 | err = sock->ops->accept(sock, *newsock, flags); | |
3359 | if (err < 0) { | |
3360 | sock_release(*newsock); | |
fa8705b0 | 3361 | *newsock = NULL; |
ac5a488e SS |
3362 | goto done; |
3363 | } | |
3364 | ||
3365 | (*newsock)->ops = sock->ops; | |
1b08534e | 3366 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3367 | |
3368 | done: | |
3369 | return err; | |
3370 | } | |
c6d409cf | 3371 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3372 | |
3373 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3374 | int flags) |
ac5a488e SS |
3375 | { |
3376 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3377 | } | |
c6d409cf | 3378 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3379 | |
3380 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3381 | int *addrlen) | |
3382 | { | |
3383 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3384 | } | |
c6d409cf | 3385 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3386 | |
3387 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3388 | int *addrlen) | |
3389 | { | |
3390 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3391 | } | |
c6d409cf | 3392 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3393 | |
3394 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3395 | char *optval, int *optlen) | |
3396 | { | |
3397 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3398 | char __user *uoptval; |
3399 | int __user *uoptlen; | |
ac5a488e SS |
3400 | int err; |
3401 | ||
fb8621bb NK |
3402 | uoptval = (char __user __force *) optval; |
3403 | uoptlen = (int __user __force *) optlen; | |
3404 | ||
ac5a488e SS |
3405 | set_fs(KERNEL_DS); |
3406 | if (level == SOL_SOCKET) | |
fb8621bb | 3407 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3408 | else |
fb8621bb NK |
3409 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3410 | uoptlen); | |
ac5a488e SS |
3411 | set_fs(oldfs); |
3412 | return err; | |
3413 | } | |
c6d409cf | 3414 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3415 | |
3416 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3417 | char *optval, unsigned int optlen) |
ac5a488e SS |
3418 | { |
3419 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3420 | char __user *uoptval; |
ac5a488e SS |
3421 | int err; |
3422 | ||
fb8621bb NK |
3423 | uoptval = (char __user __force *) optval; |
3424 | ||
ac5a488e SS |
3425 | set_fs(KERNEL_DS); |
3426 | if (level == SOL_SOCKET) | |
fb8621bb | 3427 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3428 | else |
fb8621bb | 3429 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3430 | optlen); |
3431 | set_fs(oldfs); | |
3432 | return err; | |
3433 | } | |
c6d409cf | 3434 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3435 | |
3436 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3437 | size_t size, int flags) | |
3438 | { | |
3439 | if (sock->ops->sendpage) | |
3440 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3441 | ||
3442 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3443 | } | |
c6d409cf | 3444 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3445 | |
3446 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3447 | { | |
3448 | mm_segment_t oldfs = get_fs(); | |
3449 | int err; | |
3450 | ||
3451 | set_fs(KERNEL_DS); | |
3452 | err = sock->ops->ioctl(sock, cmd, arg); | |
3453 | set_fs(oldfs); | |
3454 | ||
3455 | return err; | |
3456 | } | |
c6d409cf | 3457 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3458 | |
91cf45f0 TM |
3459 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3460 | { | |
3461 | return sock->ops->shutdown(sock, how); | |
3462 | } | |
91cf45f0 | 3463 | EXPORT_SYMBOL(kernel_sock_shutdown); |